How safe are room fresheners? Know these things before using them

 How safe are room fresheners? Know these things before using them

Room fresheners can add chemicals to the air inside your home, and the risks depend on the product, amount, contact time, ventilation, and individual sensitivity.

Scented chemicals can react with ozone to form formaldehyde, particulate matter, and other secondary pollutants, which can cause headaches, coughing, and difficulty breathing in asthmatics and sensitive individuals.

The use of room fresheners, such as sprays, plug-ins, automatic sprays, reed diffusers, gels, and fragrance beads, is increasing to create a pleasant aroma in the room. These products have become everyday items in many homes because they remove odors and make the room fragrant for a while. But what chemicals are these fragrant products adding to the air inside your home? Are there any health concerns with long-term use?

There is no evidence that using room fresheners causes health problems in everyone. The risk depends on the chemicals used in the product, the amount used, the length of time in contact, the air circulation in the room, and the individual's sensitivity. According to the U.S. Environmental Protection Agency, some fragrances can cause asthma or other adverse reactions in sensitive individuals.

Therefore, instead of considering room fresheners as completely harmless or completely safe, it is advisable to use them in small quantities, as needed, and in a place with adequate ventilation.

What is in a room freshener?

The chemical composition of room fresheners varies depending on the type of product. Typically, such products contain fragrance chemicals, essential oils, solvents, and other substances that help disperse the fragrance into the air. Aerosol sprays may use propellants, while reed diffusers, gels, and fragrance beads work to slowly disperse the fragrance.

Even products labeled 'natural', 'green', or 'essential oils' do not necessarily mean they are chemical-free. Essential oils also contain volatile and reactive substances that can change the chemistry of indoor air.

Therefore, just because a product label says “natural” or “low-VOC” doesn’t mean it’s safe for everyone. According to the Environmental Protection Agency, a “low-VOC” or “no-VOC” label doesn’t necessarily indicate that the product contains all the potentially harmful volatile chemicals.

Fragrances can also cause other pollutants

Some of the fragrances in room fresheners can react with ozone already present in indoor air. This reaction can produce formaldehyde, particulate matter, and other secondary pollutants, according to the Environmental Protection Agency. This is especially true for products with scents like citrus or pine.

A study published in 2021 found that some air fresheners tested at “high use” levels could significantly increase particulate matter levels over an hour. The study concluded that while there was no concern about long-term exposure under normal use conditions, excessive exposure should be reduced.

What this shows is that the risks of room fresheners depend not only on the chemicals in the product, but also on the amount of use and the conditions in the room.

Who is most at risk?

Room fresheners can cause headaches, irritation in the nose and throat, coughing, chest tightness, or difficulty breathing in people who are sensitive to fragrances. People with asthma or other respiratory sensitivities should be especially careful. The EPA also notes that fragrances can cause asthma symptoms and other adverse reactions in sensitive people.

So if someone in your home experiences frequent headaches, coughing, or difficulty breathing after using a room freshener, don’t just dismiss it as “not liking the scent.”

Special precautions for children

Liquid room freshener refills, reed diffusers, gels, and fragrance beads should be kept out of the reach of children. Children may accidentally swallow these substances or get them in their eyes or on their skin.

In particular, liquid refills should not be stored in a way that looks like a water or beverage bottle. After use, the bottle should be tightly closed and stored in a safe place. If a child swallows liquid room freshener, it is best to have the product packet or label with you and seek immediate medical advice or contact your local poison control center instead of trying to induce vomiting at home.

When using a plug-in air freshener

Since plug-in air fresheners run continuously, they can release fragrant chemicals into the air for a long time. Therefore, you should choose an appropriate product according to the size of the room and follow the manufacturer's instructions.

Do not place the plug-in air freshener near curtains, bedding, or other flammable materials. If the plug, cord, or appliance becomes unusually hot, frayed, or damaged, stop using it.

Extra precautions for automatic sprays and aerosols

Aerosol sprays may contain flammable materials, so do not use them near candles or flames. Spray when the room is empty. It is best to let the air circulate for a while afterwards. Ensure adequate fresh air and ventilation when using the product.

The difference between ‘odor removal’ and ‘odor masking’

Room In most cases, air fresheners mask the odor rather than eliminating the actual source of the odor. Therefore, if a room has a persistent odor, it is important to find the cause rather than spraying air fresheners repeatedly.

Dirt, damp clothes, garbage disposals, drains, moisture, mold, or inadequate ventilation can be the cause of the odor. Cleaning the actual source, opening windows, and improving ventilation can be more effective than excessive use of room fresheners.

What to do if it gets on your skin or eyes?

If room freshener gets on your skin, wash the affected area thoroughly with soap and water. If it gets in your eyes, rinse thoroughly with clean water. If irritation, redness, or other problems persist for a long time, seek medical attention.

If a large amount of spray has been inhaled and you are experiencing persistent coughing, difficulty breathing, or chest tightness, move to fresh air and seek immediate medical attention if necessary.

7 Ways to Use Room Fresheners Safely

1. Use sparingly: You don't need to spray a lot to make a room smell good.

2. Improve ventilation: Open windows or doors or arrange for air circulation.

3. Read the label: Follow directions for use, warnings, and storage instructions.

4. Keep away from children and pets: Keep liquid refills, gels, and beads in a safe place.

5. Keep away from fire: Keep aerosols and products containing flammable materials away from open flames.

6. Stop using if you experience problems: Stop using if you experience headaches, coughing, eye or throat irritation, or difficulty breathing.

7. Eliminate the cause of the odor: Instead of just covering up the odor with a freshener, remove dirt, moisture, mold, or other sources.

How is lung cancer treated? Let's go into detail

 How is lung cancer treated? Let's go into detail

Surgery can be an important treatment when the cancer is confined to the lungs and the patient can tolerate surgery.

Lung cancer may not have symptoms in the early stages, so if you have a cough, chest pain, or blood in your sputum, you should see your doctor.

Lung cancer is one of the most serious health problems worldwide. Since there may be no obvious symptoms in its early stages, many people are diagnosed only after the disease has spread. People who smoke for a long time are especially at risk. However, even non-smokers can get lung cancer. Timely diagnosis of the disease and starting the correct treatment according to the type and condition of cancer is considered very important for the treatment results.

Lung cancer is mainly of two types, non-small cell lung cancer and small cell lung cancer. Non-small cell lung cancer is seen relatively more. These two types of cancer may differ in growth, spread and treatment. Therefore, all patients with lung cancer are not treated in the same way.

Why does lung cancer occur?

The most important risk factor for lung cancer is smoking. Consumption of cigarettes, bindis and other tobacco products increases its risk. Second-hand smoke can also increase the risk of living with a smoker for long periods of time.

Similarly, exposure to air pollution, long-term contact with some industrial chemicals, radon gas, and some types of dust or toxic substances in the workplace can also increase the risk. Although the risk increases with age, lung cancer can occur in people of any age.

What are the initial symptoms?

In the early stages of lung cancer, there may be no symptoms. Symptoms may include prolonged coughing, changes in the appearance of an old cough, difficulty breathing, chest pain, blood in the sputum, frequent lung infections, changes in voice, abnormal weight loss, loss of appetite, and excessive fatigue.

The presence of any of these symptoms does not necessarily mean that cancer is present. These symptoms can also be seen in many other diseases. But if the symptoms persist for a long time, it is necessary to check with a doctor.

How is cancer diagnosed before treatment?

If lung cancer is suspected, the doctor will conduct necessary tests after obtaining information about the patient's health history, smoking status and symptoms. Usually, imaging tests such as chest X-rays and CT scans can look for abnormal lumps or other changes in the lungs.

But imaging tests alone do not definitively confirm cancer. Biopsy is done if necessary. In this, tissue or cells are removed from the suspicious part and tested in the laboratory.

In some cases, the necessary tissue can be removed by viewing the inside of the trachea and lungs through bronchoscopy. In some cases, a sample is taken from the lung nodule through a needle. Sputum cytology can also be done to see if there are cancer cells in the stool.

Why is it important to find out the stage of cancer?

The next important step after cancer is confirmed is staging. That is, how big the cancer is, whether it has spread to nearby lymph nodes and whether it has reached other parts of the body is found out.

For this, tests such as CT scan, PET scan, MRI of the brain can be done as needed. Knowing the stage of cancer makes it easier to plan the right treatment.

Generally, lung cancer is classified into different stages from early stage to advanced stage. In the early stages, the cancer may be limited to the lungs, while in the advanced stage, it may spread to nearby lymph nodes or other parts of the body.

Why are biomarker and gene testing important?

Especially in non-small cell lung cancer, molecular or biomarker tests can be important in choosing treatment. Cancer cells can be tested for certain gene changes such as EGFR, ALK, ROS, BRAF, KRAS, MET, RET, and NTRK. Similarly, in some cases, biomarkers such as PD-L1 are also tested.

Such tests help the doctor to decide which of the targeted drugs or immunotherapy might be useful. So just knowing the name of the cancer is not enough when the cancer is confirmed; It may also be important to understand its biological characteristics.

How is lung cancer treated?

Lung cancer treatment is not the same for all patients. Treatment is selected based on the type of cancer, stage, gene mutation, tumor location, patient's age, lung function and overall health.

1. Surgery

Surgery can be an important treatment when the cancer is confined to the lungs and the patient can tolerate surgery. In surgery, the cancerous part is removed.

Wedge resection or segmentectomy can be done in small tumors. A lobectomy is performed in cases where the entire lobe with cancer needs to be removed. In special circumstances, pneumonectomy is performed when the entire lung needs to be removed. During surgery, nearby lymph nodes can also be removed to check if the cancer has spread.

2. Chemotherapy

In chemotherapy, drugs are used to stop or destroy the growth of cancer cells. Medicines are usually given intravenously, but some medicines can also be taken orally are Chemotherapy may be used to reduce the size of the tumor before surgery or to destroy cancer cells that may remain in the body after surgery. In advanced cases, it is also used to control the growth of the disease and reduce the symptoms.

Side effects such as fatigue, nausea, loss of appetite, hair loss and decrease in the number of blood cells may occur during chemotherapy. But not all side effects are seen in all patients and many can be controlled with medication and other supportive treatments.

3. Radiation therapy

In radiation therapy, an attempt is made to destroy or control cancer cells by targeting high-energy rays at the cancerous part. It can be used before or after surgery. Radiation may be the main treatment for some early cancers that cannot be operated on. In advanced cases, radiation can also be used to reduce pain, bleeding, or other symptoms caused by the spread of cancer.

4. Stereotactic body radiotherapy

Stereotactic body radiotherapy is a very precise technique of radiation therapy. In this, a high dose of radiation is targeted at a specific location with a small tumor and an attempt is made to protect the surrounding healthy tissue as much as possible. This treatment may be useful in some early-stage non-small cell lung cancer patients who cannot undergo surgery.

5. Targeted drug therapy

Targeted therapy can be used if certain gene changes or other specific biological changes are found in cancer cells. Its purpose is to target specific processes that cause cancer to grow compared to normal cells. But targeted drugs are not effective for all patients who do not have gene changes. Therefore, it is important to test the necessary biomarkers before treatment.

6. Immunotherapy

Immunotherapy helps the body's immune system to work effectively against cancer cells. In some types of advanced lung cancer, immunotherapy may be used alone or in combination with chemotherapy. The doctor decides which patient to give this treatment based on the type of cancer, stage and necessary biomarker tests.

7. Supportive care is also important during treatment

Cancer treatment is not only about removing the tumor or stopping the growth of cancer. Management of problems such as pain, difficulty breathing, nausea, loss of appetite, weakness and mental stress during treatment is also important.

This is called supportive or palliative care. Such care can be initiated not only at the end of treatment but also as needed along with cancer treatment. Its purpose is to improve the patient's quality of life and control symptoms.

Why is regular follow-up necessary after treatment?

Even after the treatment is completed, regular follow-up is necessary. The doctor can perform a physical examination, necessary imaging and other tests based on the patient's condition. From this, it can be evaluated whether the cancer has reappeared, whether the treatment has long-term effects, and whether additional treatment is necessary.

What can be done to prevent lung cancer?

Not all lung cancer risks can be prevented, but many significant risks can be reduced. One of the most important steps a smoker can take is to quit smoking. Stay away from other people's smoke as much as possible.

People who come into contact with dust, chemicals or other hazardous substances in the workplace must use the necessary protective equipment. In case of high air pollution, it is also useful to take measures to reduce the risk.

Treatment is not the same for everyone

The treatment of lung cancer is now more developed than ever before. New treatments such as surgery, chemotherapy, and radiation therapy, along with targeted drugs and immunotherapy, have expanded treatment options for many patients. But the treatment is not the same for all patients. Based on the type of cancer, stage, biomarkers, patient's health condition and response to treatment, the expert doctor decides the treatment plan.

Therefore, symptoms such as prolonged coughing, blood in the sputum, chest pain, difficulty in breathing or weight loss without any reason should not be ignored. Medical examination should be done on time.

How does environmental pollution affect reproductive health?

 How does environmental pollution affect reproductive health?

It can weaken the quality of eggs. Ovarian function can decrease prematurely. Hormonal imbalance can occur.

Studies have shown that environmental pollution and harmful chemicals are having a serious negative impact on human hormonal systems and reproductive health.

Today, the world is facing the challenges of climate change, air pollution, and environmental degradation. The debate on environmental protection often focuses on the protection of forests, wildlife, rivers, and natural resources. However, scientific research in recent years has revealed that environmental risks are not limited to nature alone but also have a profound impact on human health, especially reproductive health.

The air we breathe, the food we eat, the objects we use, and the environment we live in can directly affect our body's hormonal system, reproductive capacity, and the health of future generations.

Therefore, environmental protection today has become not only a campaign to save the earth, but also a campaign to secure the health and future of future generations.

Environmental Pollution and Reproductive Health

In modern lifestyles, we are exposed to various chemicals on a daily basis. Some of the elements found in plastic bottles, pesticides used in food production, industrial pollution, smoking, chemicals in cosmetics, and polluted air are called endocrine disrupting chemicals.

These chemicals can affect the body's hormonal system. Since hormones are the basic regulators of the reproductive process, an imbalance in them can affect everything from conception to childbirth.

Impact on women

Environmental risks can also have a serious impact on reproductive health in women. This can weaken the quality of eggs. Ovarian function can decrease prematurely. Hormone imbalances can occur. Difficulty in conceiving can occur. Miscarriages and pregnancy-related complications can increase. It can also affect the success of fertility treatments.

Research has shown that environmental pollution can also affect the outcome of treatment, especially in couples undergoing infertility treatment.

Effects on Men

Long-term exposure to environmental pollution and harmful chemicals can cause various problems in male fertility. Sperm count may decrease. Sperm motility may decrease.

Sperm quality may decrease. Sperm DNA may be damaged. The chances of conception may decrease. Various studies are raising concerns about the gradual decline in sperm count in men around the world, in which environmental pollution is seen as a significant cause.

The relationship between air pollution and infertility

According to the World Health Organization, air pollution is one of the leading causes of global health risks today. Recent research has indicated that there is a direct relationship between air pollution and reproductive health.

A fact sheet presented at the European Society of Human Reproduction and Embryology 2025 stated that people living within 200 meters of a main road are at higher risk of infertility than other people.

It also states that the chance of pregnancy can increase by about 3 percent for every additional 200 meters away from a main road. This has further clarified the link between traffic pollution and reproductive health.

Pregnancy and air pollution

The effects of air pollution are not only visible before conception, but also throughout pregnancy. Fine particulate matter PM 2.5 can enter the bloodstream through the lungs and reach the unborn child. This has the potential to affect fetal development.

Climate change and maternal health

Climate change has not only increased temperatures, it has also added serious challenges to the health of pregnant women and newborns. Pregnant women exposed to extreme heat may have an increased risk of premature birth.

Low-birth-weight babies may be born. The risk of stillbirth may increase. High blood pressure may occur during pregnancy. Longer hospital stays may be required.

Rising temperatures, heat waves, floods, inundations and natural disasters are also affecting pregnant women's access to health services.

Global impact of the climate crisis

According to the World Health Organization, about 3.6 billion people in the world live in areas highly vulnerable to the health impacts of climate change.

The impact is not the same for everyone. Economically and socially vulnerable communities, women in rural areas, pregnant women and newborns are at higher risk. The impact can be even more severe in communities with limited access to health services.

What should be done now?

The evidence on the link between climate change, environmental pollution and reproductive health is constantly strengthening. Therefore, it is now necessary to look at public health, the environment and climate change from an integrated perspective, not as separate issues.

- To this end, air pollution control should be prioritized. The use of clean and renewable energy should be increased.

- The use of plastics and harmful chemicals should be reduced. Special attention should be paid to the safety of pregnant women and newborns.

- Climate-resilient health systems should be developed.

- Investment in scientific research and evidence-based policymaking should be increased A campaign should be launched at the community level to adopt an environmentally friendly lifestyle.

How at risk is Nepal from the Hanta virus that has swept the world?

 How at risk is Nepal from the Hanta virus that has swept the world?

Since the initial symptoms of many infectious diseases are very similar to each other, laboratory tests are helpful in distinguishing the infection.

According to the World Health Organization, 3 out of 8 people have died from Hanta virus seen on a cruise ship.

Although Hanta virus is transmitted through the feces, urine or saliva of infected rats, it has been confirmed that the 'Andean' species can be transmitted from person to person.

Nepal is at risk of Hanta virus, but even if it has not been confirmed as an outbreak, regular testing and research are necessary.

Recently, the Hanta virus seen on a cruise ship has swept the world. According to the information published by the World Health Organization a few days ago (on May 8), 3 out of 8 people have died.

That is, about 38 percent of the infected have died. This human-to-human transmission is considered very rare, but currently, dozens of cases on cruise ships have become a matter of concern and interest.

At the time of writing, the main source of infection is unknown. Information on the circumstances under which it spread from person to person is yet to be released.

Hantavirus can be transmitted to humans through contact with the feces, urine, or saliva of infected rats. Even if an infected rat does not show symptoms, it can still cause death if it infects humans.

The mortality rate of the Hantavirus strain seen in the Americas is many times higher than that of the Hantavirus strain seen in Europe and Asia, which is about 50 percent. Recently, a cruise ship has seen a mortality rate of about 38 percent. The World Health Organization has reported that the mortality rate of the Hantavirus strain seen in Europe and Asia is up to 15 percent.

Although Hantavirus is said to be transmitted only through the feces, urine, or saliva of infected rats, the ‘Andean’ strain of Hantavirus can be transmitted from person to person to some extent.

The Hantavirus strain currently circulating on cruise ships has also been confirmed by gene sequencing to be ‘Andean’. Hantavirus is mainly divided into two types based on symptoms, which also vary according to geographical location.

First, Hanta pulmonary syndrome and second, hemorrhagic fever with renal syndrome.

Hanta pulmonary syndrome is mainly seen in the Americas, while hemorrhagic fever with renal syndrome and Hantavirus are seen in Europe and Asia.

Hanta pulmonary syndrome is characterized by symptoms such as fever, chills and dizziness, muscle pain, diarrhea, nausea or vomiting, abdominal pain, and low blood pressure. If it becomes complicated, coughing, difficulty breathing, chest tightness, and pneumonia may occur.

These symptoms may appear within one to six weeks of infection.

Hemorrhagic Fever with Renal Syndrome Hanta virus causes chills, stomach pain, headache, nausea, blurred vision, red eyes, and later complications, bleeding, and there is a risk of kidney failure.

These symptoms appear one to two weeks after infection, and sometimes up to 8 weeks. This Hanta virus is seen in Asia, especially in countries like China, Korea, Japan, and Russia. Research articles have also been published that Hanta virus has been seen in neighboring India. But there is no information that it has taken the form of a major outbreak.

Is there a risk of Hanta virus in Nepal?

Hanta virus is transmitted when it comes into contact with rat feces, urine, or saliva. Rats are seen in significant numbers in all villages and cities in Nepal.

The number of people who come to Teku Hospital for treatment of rat bites is also high. Most people with such problems do not come to the hospital. There is a lot of contact between humans and rats in Nepal too.

Hundreds of scrub typhus cases are reported in Nepal every year. The main source of scrub typhus infection is the mite found in rats. This also clearly shows that the risk of any infection that can be spread by rats in Nepal is high.

Hanta virus is no exception. In 2017, a tourist fell ill and was admitted to the ICU immediately after returning to his country after visiting Nepal. A research article was published stating that the person had been diagnosed with hanta virus. This was published in an American medical journal in 2020.

This also indicates that the risk of hanta virus is present in Nepal.

However, as in India, there is no confirmation of an outbreak in Nepal yet. Since this infection is not included in routine laboratory tests, we are unaware of the status of hanta virus in Nepal.

Blood tests of tourists infected with hanta virus in Nepal show a decrease in platelet count and an increase in liver enzymes, which the author has experienced is also widely seen in fever patients in Nepal.

However, the possibility of Hantavirus seems to be overlooked when sending for diagnostic tests for limited infections. Since a large number of fever patients are still not diagnosed in Nepal, there is a need to increase the scope of testing.

In the case of a new infection or a first-time infection, testing for that infection should also be included in routine testing. Since the initial symptoms of many infectious diseases are very similar to each other, laboratory testing is helpful in distinguishing infections. Only if the infection is diagnosed can treatment, prevention, and counseling be correct.

Currently, the World Health Organization has stated that the risk of further spread of this virus is low. However, the number of infections on a cruise ship at the same time is so high. And as the problem becomes more complicated and the mortality rate is higher, it cannot be ruled out that the contagiousness and lethality of this virus has increased compared to the past.

Nepal cannot completely ignore the risk of the virus, given the confirmed research on this virus and the frequent contact with rats, which is considered the source of the virus.

If national guidelines were developed in Nepal, prioritizing research on Hanta virus, it would be useful for health workers in diagnosis, treatment, and prevention.

Use of AI in healthcare: How useful, how dangerous?

 Use of AI in healthcare: How useful, how dangerous?

Doctors use AI in conjunction with their knowledge, experience, and patient conditions, and the risk increases when patients base their decisions on that.

Use of AI in healthcare: How useful, how dangerous?

AI is not a replacement for doctors, but a tool to expand their capabilities, and its responsible use in the healthcare sector is necessary.

Some time ago, during the confusing time when the Medical Education Commission announced the PG results, I created a ‘seat predictor’ tool using available data and AI.

Recently, when the actual results of the government seat came out, this tool of mine seemed to be ‘conservatively’ very safe. The tool had ‘underestimated’ the actual rank somewhat, so that doctors did not have false expectations and could make safe decisions.

I have also included its detailed description and how to use it in the description of the MD/MS video of my Bimarsha Acharya YouTube channel. This small experiment made me realize one big thing, that AI is not an ‘enemy’ for the Nepali healthcare sector, but rather a powerful ‘co-pilot’ for those who know how to use it correctly.

In this context, I have been conducting clinical research training sessions, in which I have also been regularly covering the use of AI, its ethical aspects and its responsible integration into daily medical practice.

In the process, I have trained more than 700 doctors and medical students in Nepal. This experience has further highlighted the need to use AI not just as a tool, but also in a safe and responsible way with proper guidance.

AI has become like a companion to me while seeing patients daily in the hospital. I use it regularly to remember medication doses or precautions, compare different treatment methods, align my decisions with international guidelines and understand the results of the latest research and trials. In complex cases, comparing your initial clinical thinking with evidence-based information makes decisions clearer and more confident. In this way, AI is a powerful tool to augment the capabilities of doctors, not replace them.

AI for doctors: Which is more useful?

The various AI tools in use today, such as Grok, Gemnai, ChatGPT, Perplexity, and OpenEvidence, have their own roles. However, their use varies depending on the context. ChatGPT, Gemnai, or Grok can be useful for understanding general information, clarifying concepts, and facilitating quick clarification. Perplexity presents information with sources, making it easier to search and compare. However, evidence-based, contextual, and up-to-date information is extremely important for clinical decisions.

OpenEvidence is considered particularly useful in this regard. This platform focuses on providing evidence-based information based on international journals, clinical trials, and established guidelines. It shows doctors not just the answer, but also the scientific basis for it, which makes clinical decisions safe, reliable, and accountable.

Therefore, while various AI tools can be used for general understanding, OpenEvidence is considered one of the most suitable options in the current situation as an evidence-based platform for clinical practice and decision-making.

The danger of relying on AI's advice

Nowadays, many patients have started using AI like doctors. There is an increasing trend of seeking medical advice directly after experiencing common symptoms, which can be a serious danger.

For example, if someone has a stomach ache, AI can recommend a medicine to relieve common pain. But a serious problem like appendicitis may be hidden within that symptom. Even if the medicine provides relief for some time, the disease may become more complicated.

This is where the difference between AI used by doctors and patients becomes clear. Doctors use AI by combining their knowledge, experience, and patient's condition, while patients directly base their decisions on it, which increases the risk. Self-medication can sometimes even put lives at risk.

AI in Nepal's health sector

In a country with geographical challenges like Nepal, AI can bring about a major change in healthcare. In remote areas where there is a lack of specialist doctors, AI can help in decision-making at the primary level. Its use in X-rays, cardiac tests or emergency assessment can guide timely treatment.

Combining AI with telemedicine can reduce the distance between villages and cities. Patients can get specialist services nearby, while doctors can also provide better service with limited resources.

AI can also play a big role in the research sector. It can help increase participation in complex studies, data analysis and international publications. This has the potential to make Nepal’s health system knowledge-based and technology-friendly.

Our responsibility now

The future competition will not be between doctors and AI, but between doctors who know how to use AI and those who do not. A system that cannot adapt with time will fall behind.

Therefore, it is necessary for both the government and the private sector to work together to formulate a clear policy to integrate AI into the health system. It is imperative to provide training, resources and incentives to doctors.

If we fail to embrace this technology today, we will be unable to compete globally tomorrow. But if we move in the right direction, Nepali health care The sector can establish its identity on an international level.

The question now is clear: will we lead the change or lag behind it?

Lungs: What they are, how they work?

 Lungs: What they are, how they work?

Damage to the lungs from minor infections or injuries can heal on their own, but damage from smoking, pollution, or chronic diseases can be permanent.

The lungs are the main part of our respiratory system and work to deliver oxygen to the body and remove carbon dioxide.

How many times do you breathe in a minute? In seconds? Have you ever counted? How long can you live without taking a breath? Have you ever wondered about this?

Because breathing in and out is an automatic process, for which you do not have to make any extra effort. But, what happens if that breath suddenly stops? You certainly have the answer.

Not only is it essential for life, but the lungs play a major role in taking in and releasing oxygen, which is needed every moment.

The lungs, which are soft, sponge-like structures inside the chest, supply the body with oxygen and energy and remove toxic carbon dioxide.

What role do the lungs play in the continuous process from taking in oxygen to taking out carbon dioxide? Why are two lungs necessary? How much damage does smoking cause?

What is the function of the lungs and what is their structure?

The lungs are the main organs of our respiratory system. They are made of soft, flexible tissue like a sponge and are located inside the chest around the heart. The lungs have a thin membrane on the outside that protects them. They are divided into two parts: the right lung has three parts: ‘upper, middle and lower’. The left lung has two parts: ‘upper and lower’. The left lung is slightly smaller because the heart occupies more space on the left.

The respiratory system begins with the nose or mouth. Air enters the trachea through the throat. It is then divided into two parts. The air we inhale enters the right and left lungs separately. After reaching the lungs, the bronchi divide 23 times like the branches of a tree, reaching the smallest tubes and ending at the ‘alveoli’ (air sacs).

The alveoli are thin membranous tissues like grape clusters, around which the blood vessels coming from the heart are spread like a spider web. An adult has 300 million to 600 million alveoli.

If the lungs are fully expanded, their surface area is 70-100 square meters, the size of a tennis court. The lung weighs 1 to 1.2 kilograms. The right one is slightly larger and heavier. The lung is the only organ in the body that can float in water, because it is always full of air. Even after breathing out completely, about 1 liter of air remains in it.

What is its main function?

The main function of the lungs is to supply oxygen to the body and remove carbon dioxide, which is called gas exchange. This is possible due to the thin membrane between the alveoli and the blood vessels.

Oxygen is absorbed from the air coming from outside and enters the circulatory system and reaches various cells of the body to provide energy. Similarly, carbon dioxide, a toxic gas produced by the body's organs, enters the alveoli through the blood vessels and is released when we exhale. This process continues continuously. The lungs also filter the air, which protects the body from infection.

It produces phlegm, which traps dust, germs, and pollutants and expels them when we cough them up. We breathe 8,000 to 9,000 liters of air every day, but the body uses only 5 percent of the oxygen from this air. The lungs are closely connected to the heart, so heart problems can also affect the lungs.

Why do humans have two lungs? What happens if one lung fails?

The main reason for having two lungs is for the body’s balance and safety. Both lungs work separately but support each other. If one lung develops a problem, such as cancer or infection, the other one takes over, which can help save lives. This makes it easier for the heart and other organs to function together.

Even if one lung is completely removed, a person can still survive, but not at full capacity. The failed lung can cause problems such as infection, blistering, or bleeding, and the infection can spread to the other lung because there is no barrier between the two.

Pollution or other external factors affect both equally, but some diseases can affect only one side. If a failed lung causes a lot of problems, it may need to be surgically removed.

How do the lungs take in and expel air?

The process of taking in air is called respiration, which consists of two stages – ‘inhalation’, which is the process of drawing air in, and ‘exhalation’, which is the process of expelling air out. This process is controlled by the brain and occurs 12-20 times per minute.

During inhalation, air from the nose or mouth passes through the throat, trachea, bronchi, and small tubes in the lungs, and then reaches the alveoli. The diaphragm muscle moves down, increasing the space in the chest, which draws air in. About half a liter of air is taken in with each breath.

During exhalation, the diaphragm moves up, the chest narrows, and air is expelled from the lungs. This process is also called ventilation. It is affected in chronic lung diseases, which are called respiratory failure. Sudden problems such as food getting stuck in the airway or tumors can also affect it.

Is there a chance of recovery if the lungs are damaged? How does smoking affect this?

The likelihood of lung damage depends on the type and extent of damage. The lungs have some ability to regenerate. They can heal themselves from minor infections or injuries, such as damage from the flu or pneumonia, which can be treated and cured with time and rest. However, serious damage caused by smoking, pollution, or chronic diseases such as COPD, fibrosis, or cancer can be permanent and may not fully recover. In such cases, medical treatment, medication, or surgery may be necessary.

Smoking is harmful to the lungs. It damages the fine hairs and membranes of the airways, which makes it easier for dust, smoke, or viruses to enter the lungs. This increases the risk of pneumonia or other infections. Smokers' lungs become black/brown, inflamed, and damaged. However, quitting smoking has a positive effect on the lungs. The lungs have various defense mechanisms, such as nasal hairs, which are damaged by smoking but largely repaired after quitting.

Although not completely restored, the risk of infection is reduced and health improves. Quitting smoking is beneficial at any age, even up to 90 years. A healthy lifestyle, exercise, and avoiding pollution increase the chances of recovery, but this depends on individual health. If there is a problem, it is best to consult a doctor.

What are the main problems that occur in the lungs? And how to maintain lung health?

Immediate problems in the lungs such as colds, coughs, nasal congestion, sore throat, fever, chest pain, and problems with the airways that cause coughing or wheezing. In the long term, pneumonia, lung infections, asthma, pulmonary fibrosis, and lung cancer are the main ones. Lung infections, asthma, and cancer are more common in Nepal. As diseases like asthma increase, lung capacity decreases, which affects daily life.

Lung health depends on daily air quality, diet and lifestyle. Healthy lungs are pink in color. To keep them healthy, you should quit smoking completely, exercise regularly, which increases lung capacity.

Wear a mask to avoid pollution, breathe clean air, eat a balanced diet and drink enough water. If you have difficulty breathing, cough or chest pain, you should immediately get checked by a doctor. Since the lungs are connected to the heart and other organs, it is necessary to pay attention to overall health.

How did mega concerts and tours become a money-printing machine?

 How did mega concerts and tours become a money-printing machine?

Taylor Swift's 'The Era' mega concert has grossed over $2 billion in two years, performing in 189 venues.

K-pop artists have adopted new strategies to connect with fans and make concert tours successful by using social media and technology.

As album sales have declined due to the development of digital technology, artists have made concert tours their main source of income.

Taylor Swift's mega concert 'The Era' ended in December 2024. A mega concert is a concert held in multiple venues under one banner. Taylor performed in 189 venues around the world for two years.

The tour also became the highest-grossing music event of all time. During that period, the tour grossed over $2 billion. No previous mega tour had grossed even half of that.

Nine months later, pop band Coldplay wrapped up their ‘Music of the Spheres’ world tour. Coldplay’s mega tour grossed over $1.5 billion.

This raises the question of how music’s mega concerts and tours are becoming a platform for generating more revenue.

Large fan base

How do musicians grow their fan base? How do they keep their fan base growing? We can look to K-pop artists to understand this.

K-pop is a blend of Korean and Western music styles. Their melodies and lyrics have energetic and swinging beats. And with that, dancing is also included. Not only that, K-pop artists are using social media and technology to connect with their fans.

Regarding their success, Kevin Kim, Asia head of Seoul-based music distribution company Root Notes, says, “One of the big differences between Western artists and Korean artists is that Korean K-pop artists are always online. They have a strong presence on YouTube. Many artists also chat directly with their fans through the ‘Bubble’ app.”

‘Bubble’ is a South Korean social networking platform. Through it, fans can communicate directly with their music stars.

Similarly, through the same app, K-pop artists also know how many fans they have. And, based on that, they plan their concert tours.

K-pop fans are also very emotional about the artists. Because some fans travel to distant cities and even other countries just to see an artist’s concert.

Concerts are often a new experience for K-pop fans. At the concert, fans carry a ‘light stick’, the color of which indicates which region they are from. Also, the organizers of the concert control the light of the light stick during the event. So that its color changes with different melodies of the music.

According to Kevin Kim, the light stick is made of very advanced technology. This makes the musical atmosphere at the concert different.

This makes the concert experience for fans very ‘dynamic’. They feel like they are part of the music. However, K-pop artists sell not only light sticks, but also other goods.

‘Korean artists sell many things such as posters, T-shirts and key chains with their pictures. T-shirts and key chains with new pictures are made and released for each concert,’ says Kevin Kim, ‘Their fans buy these things with great interest. And, collect them.’

These strategies have made concert tours more profitable than ever. But, the question arises, how was such a huge success possible? How did the old ways of making money by selling albums or CDs change?

Digital change

According to Serona Elton, a professor at the Frost School of Music at the University of Miami in the US, pop music bands used to use concert tours to promote their new music albums or CDs. However, now these music bands are making a direct profit from concert tours.

According to her, one of the main reasons for this is the change in digital technology in the last 20 years. Earlier, people used to go to music stores to buy an artist's album. However, now their songs can be easily downloaded from the Internet.

'Earlier, young people used to buy most music records or CDs. Now they use digital technology. This has changed the equation of the music industry, says Serena Elton, “When artists saw their music record sales gradually decreasing, they also started to make money through concert tours.”

During such concert tours, the internet streaming of artists’ music also increases. Because as soon as the concert is announced, fans start buying albums online. Although it does not benefit much. The main focus of artists is to perform grand concerts and sell all the tickets as much as possible. Again, to perform a grandiose concert requires a corresponding investment.

The grandeur of the concert

Often, such concerts are held in huge stadiums, where thousands of fans come. Fans sitting two or three rows behind the stage do not see the artists performing on the stage clearly. In such a case, large video screens must be installed in the stadium. So that the artists can be seen clearly and up close.

Similarly, the light and sound are also of the same level. And the same time and manpower are required to build the stage, dismantle it and move it to a new place. That's why it is essential to make a profit when doing such a big mega concert.

Social media also plays an equal role in making a concert tour successful. Usually, when performing at any place, the ratio of fans and purchasing power are considered a lot.

The economics of the tour

According to Adam Behr, head of the music department at Newcastle University in the UK, the work of pop music artists was not like it is now. They used to go to the studio. They would record an album. Then they would start promoting it. Music labels would help organize the tour. But in the digital age, this equation has changed.

'There is no limit to the online streaming of albums. But tickets for tour concerts are limited. The fun of live music is different. It makes the experience special,' says Adam Behr, 'that's why tour concerts are a hugely profitable business.'

According to Poppy Reid, music journalist and founder of Sydney-based 'Curious Media', concert tours are not for all artists. Only artists with millions of fans can do such a concert.

According to him, even if there is money in this business, the profit margin is low. Because the investment is high. However, it is not enough for the organizers of such mega concerts. The local community is also benefiting equally.

Because the number of days these artists stay in a city, they stay with great enthusiasm. That is why some governments appeal to bands like Taylor Swift, Beyoncé and Coldplay to come to their cities.

The then Prime Minister of Canada, Justin Trudeau, President of Brazil, Lula, and the heads of state of Chile and Thailand had requested Taylor Swift to tour their countries. This shows how important this mega tour is economically.

In the case of some artists, they earn income even after the mega concert. Taylor is an example of this. Taylor made a 6-part documentary in collaboration with Disney Plus on her ‘The Era’ tour.

According to Poppy Reed, organizing such tours involves huge expenses, which artists have no choice but to recover and make a profit. However, the bigger the concert, the more money it brings in. On the other hand, fans themselves believe that this is the reason why mega tours are so successful.

How does an air purifier clean polluted air?

 How does an air purifier clean polluted air?

An air purifier only cleans the air in its coverage area. It gives good results only if you have a separate purifier for each room.

An air purifier works by continuously drawing in, cleaning and releasing air back into the room.

The CRDR shows how quickly the air is cleaned, with a higher CRDR being required for larger rooms.

When we enter a house, we think that no matter how much dust or smoke there is outside, the air in the house is clean. But the truth is that these days the air inside the house is as polluted as the air outside. Especially in big cities, where the air quality index is consistently bad.

In such a situation, most people want to buy an air purifier, but they are worried about how to identify a good quality air purifier. If you do not buy a good quality air purifier, the air will be polluted. Therefore, before buying an air purifier, it is important to fully understand its actual workings, essential features and common misconceptions.

What does an air purifier do?

Many people think that an air purifier only freshens the room. But an air purifier works in a continuous process of pulling air, cleaning it and releasing it back into the room. The fan inside the machine pulls in dirty air, dust, PM 2.5, pollen, pet dander, smoke, etc. from the room. Then various filters do their job.

The HEPA filter captures very fine particles. The activated carbon filter absorbs household odors, cooking odors and gases. The pre-filter extends the life of the HEPA by blocking large particles. Some machines also have an ionizer or hybrid system, which makes the air even better.

6 things to pay special attention to before buying an air purifier

1. The higher the CRDR, the better

CRDR 'clean air delivery rate' shows how quickly the machine cleans the air. A high CRDR is needed for a large room and a medium CRDR for a small room. If you choose the wrong CRDR, the air will never feel clean.

2. Understand the life of the filter and the cost of replacement

Many people only pay attention when buying a machine, but replacing the filter later costs a lot. An air purifier is not a one-time item, but an item that requires regular maintenance. Therefore, you should buy it only after understanding the life of the filter and the cost of replacement.

3. How much noise does it make?

Especially in winter, when the fan or AC is not running in the room, even the light sound of the purifier can be heard all night. Therefore, if the noise of the air purifier is too loud, sleep will be disturbed and the benefits will be reduced. Therefore, you should choose one with low noise.

4. Power consumption should be low

Air purifiers should be used for many hours a day. Therefore, it is beneficial to choose a machine that consumes less power.

5. Smart features are necessary

If you are tech-savvy, features like Wi-Fi, mobile apps, real-time AEQI monitoring are very convenient. They can also control the machine remotely.

6. Remove these myths from your mind right now

Myth 1: One purifier is enough for the entire house

This is completely wrong. An air purifier only cleans the air in its coverage area. Only having a separate purifier for each room gives good results.

Myth 2: HEPA filters also remove odors

HEPA only captures particles. Only activated carbon filters have the ability to clean odors and gases.

Myth 3: Purifiers are only needed in winter

The air is not only polluted in the winter, it can also be polluted in the summer. In big cities, the AQI is often bad in every month, so an air purifier is useful all year round.

Choosing an air purifier with these things in mind will provide you with truly clean and healthy air.

How to mitigate the psychosocial impact of the current crisis?

 How to mitigate the psychosocial impact of the current crisis?

Nepal is currently in a period of political transition that has increased instability and uncertainty.

The deaths and injuries of adolescents and many others in the recent violent protests have raised deep concerns.

Immediate and long-term initiatives are needed, prioritizing mental health and psychosocial support.

Nepal is once again in a period of political transition. While change itself is an inevitable process, change accompanied by uncertainty creates more uncertainty than hope. At times, we are wondering whether Nepal is on the brink of instability.

The loss of lives of adolescents and young people in recent violent protests and movements, the injury of many people, is sending a message of sorts.

The massive damage to private and public property, from archaeological heritage to the prevailing sense of insecurity in the minds of ordinary citizens, have caused us deep pain. Not only the immediate damage, but also its long-term impact, its impact on mental health, is a matter of concern and discussion.

This crisis has affected all age groups in different ways. Children and adolescents have experienced fear, confusion, sleep problems, and difficulty concentrating in school. Youth and adults have experienced increased frustration, anger, anxiety about unemployment, and strained social relationships. The elderly are experiencing feelings of insecurity. People with disabilities and marginalized communities have their own unique concerns.

If these conditions are not addressed immediately, there is a risk of increased trauma, anxiety, depression, and suicidal tendencies. There is also a risk of social breakdown, deepening distrust, decreased productivity, and a decrease in human resource capacity.

Psychosocial support is urgently needed for children, adolescents, youth, women, the elderly, people with disabilities, and marginalized communities affected by violence, death, and insecurity. Many people are in a state of confusion right now. Most people seem to believe the information they receive on social media as official information. Many seem to be unable to distinguish between right and wrong.

This type of information seems to have made people very anxious due to the pressure of uncertainty about the future.

What to do in this situation?

Both immediate and long-term initiatives are needed to address such a situation. Primarily, psychological support, helpline services operated through telephone and social media, and community-based basic psychosocial support programs need to be started immediately.

Self-care and stress management skills should be provided to security personnel, health workers, media workers, and other service providers working in the field immediately. In the long term, mental health in schools, communities, and workplaces should be linked to education, protection, and health systems through policy management.

It is essential to develop a psychosocial support system with follow-up and conduct activities. Similarly, only by ensuring quality counseling services related to trauma and grief can victims have the basis to restore their lives to balance.

In this context, the first responsibility is to address the suffering of people who died, were injured, and were disabled in the movement. Immediate treatment, rehabilitation, compensation and ensuring justice should be the first step of the state. Trust in the people can be restored only by impartial investigation and accountability in cases of human rights violations.

Similarly, it is necessary to pay attention to the control of corruption and transparency in power raised by the protesters.

Special attention should be paid to returning people's lives to their previous state, restoring employment and creating new jobs. It is necessary to immediately facilitate and restart production and business that have been stalled due to various reasons. It is necessary to create an investment-friendly environment and create an encouraging environment.

Similarly, mental health and psychosocial well-being must be a national priority. The World Health Organization and the International Labor Organization have recommended linking mental health with development and employment. Therefore, Nepal needs to take the initiative in this regard in collaboration with development partners.

In the long term, it is essential to introduce psychosocial and mental health education in schools, communities and workplaces, a structure of community-based workers (CBTs) and psychologists, and policies and systems that link mental health to the primary health system.

Good governance and transparency are also indispensable. Rebuilding trust is not possible without participation in the decision-making process, accountability through e-governance, social justice and the implementation of concrete programs to end discrimination. Nepal stands at a crossroads of crisis and opportunity today.

Only if the state can put these five foundations into practice: justice and rehabilitation for the victims of the movement, eradication of corruption, job creation and economic expansion, ensuring mental health and social cohesion, and reconstruction with good governance and transparency, will Nepal's future not be just a story of struggle, but a common home for beautiful, peaceful, healthy and happy Nepalis.