We have all seen movies where right before the hero starts fighting, he cracks his knuckles and makes it look like the coolest thing in the world! But then our parents told us that you should not crack your knuckles because that weakens your grip and hand strength. But is that true? While many people do say that they experience a small loss in strength immediately after they crack their knuckles, but are their long-term effects to it? And what is the sound actually coming from?

The reason why people crack their fingers is because the evident and sharp crack noise causes a sense of relief. Many people also do it when they have done an activity that required them to work with their hands a lot like typing or sewing, giving themselves a sense of satisfaction, similar to stretching after doing hard work. That "crack" sound can make some people cringe, while others find it strangely satisfying. Cracking your knuckles is a pretty common habit, but there are a lot of misunderstandings about it. Some people do it without even thinking, others can't stand the noise, and some can't crack their knuckles at all. You might have been told as a kid that it causes arthritis or makes your fingers swell up. But those are just old wives' tales. There's a real science behind this habit, and it's more interesting than you may think.

Why Do Knuckles Make That Popping Sound?

The "crack" isn't actually bones breaking or anything bad happening to your joints. It's a normal thing called "crepitus." This just means harmless popping, snapping, or grinding sounds that come from your joints. The main reason you hear this sound is because of gas bubbles in the fluid that cushions your joints. This fluid is called synovial fluid. When you move or stretch, these tiny bubbles form and then pop, making the sound. It's totally normal and doesn't hurt you. Sometimes, especially in bigger joints like your knees, shoulders, or ankles, the sound can also happen when the stretchy tissues that connect your bones (ligaments and tendons) move slightly and then snap back into place.

After you crack your knuckles, you can't usually do it again right away. You have to wait a bit. That's because the gas bubbles in your joint fluid have already popped, and it takes a little while for them to build up again. While cracking your knuckles doesn't give you arthritis, doing it too much might cause some problems. Doctors say that cracking them too often could make your joints a little wobbly and might even make your grip weaker. Also, if the stretchy tissues in your joints keep snapping over your bones, they can get irritated and sore.

When Joint Popping Might Mean Something More

Sometimes, a pop in your joint is just like cracking your knuckles, nothing to worry about. But other times, it can be a sign of something else. As we get older, the cushiony stuff in our joints, called cartilage, can start to wear down. This cartilage helps your bones move smoothly. When it gets thin or uneven, the bones can rub together, and that can make a grinding or popping sound. This is different from the pop you get from gas bubbles. If this grinding sound happens along with pain, it could be a sign of osteoarthritis. This is a type of joint problem that's more common in older people, but younger people can get it too, especially after a joint injury. If your joints hurt, especially in the morning or after you've been sitting still for a while, feel wobbly, or are hard to move, it's a good idea to see a doctor.

When was the last time you took the stairs without thinking twice, walked to the market without needing a break, or said yes to an outing without worrying about how tiring it might be?

Sometimes, the first sign that something has changed with your health is not a new symptom, but an activity you have quietly given up. A morning walk gets shorter, a flight of stairs calls for a pause, or a favourite weekend outing starts to feel like too much effort. It is easy to put these changes down to age, but they may be telling you something worth investigating.

A simple “activity audit” can help you connect the dots. Instead of asking only whether you feel unwell, compare what you could comfortably do a few years ago with what you can manage today.

Could you walk the same distance without stopping? Have stairs that once felt routine become difficult? Have you cut back on morning walks, stopped playing a favourite sport or become less inclined to leave the house? Do everyday activities such as grocery shopping, gardening or household chores require more effort than before?

These questions are particularly relevant after age 45, when declining stamina may be attributed entirely to ageing. However, a persistent change in exercise tolerance or everyday activity should not automatically be dismissed as a normal consequence of ageing.

Breathlessness during activity, unusual fatigue, dizziness or light-headedness, swelling in the feet or ankles, and palpitations can occur in people with heart valve disease. These symptoms can also have other causes, but if they are persistent, unexplained or worsening, they warrant discussion with a healthcare professional.

Heart valve disease can develop gradually, allowing people to adapt their routines without recognising the underlying problem. Someone who becomes breathless while walking may take shorter routes, while another person may avoid stairs or social activities that involve physical exertion. Eventually, these adjustments can become part of daily life, making it harder to recognise a change in health.

Looking back can help restore that perspective. A simple three-part comparison offers a useful starting point: What could I do before? What can I do now? What changed in between?

Family members can also help identify differences that an older relative may have overlooked. A parent who once travelled regularly may begin avoiding trips, while someone who enjoyed gardening, shopping or meeting friends may increasingly prefer to stay home. These observations cannot establish a diagnosis, but they can prompt a timely conversation about health.

If breathlessness, fatigue, dizziness, swelling, or palpitations are new, persistent, or interfering with everyday activities, consulting a doctor can help determine the cause. Depending on the symptoms and medical history, the evaluation may include a physical examination and an echocardiogram, commonly called a 2D echo. This ultrasound test helps assess the heart's structure and how its valves function.

An activity audit is not a diagnostic test. Its purpose is to help people recognise changes that might otherwise go unnoticed and decide when to seek medical advice.

Growing older does not necessarily mean giving up the activities that make everyday life enjoyable. Paying attention to changes in physical ability can help distinguish an expected adjustment from a potential health concern.

Start your activity audit today. Think about three activities you could comfortably do a few years ago but now find difficult, tiring or have stopped altogether. Note when these changes began and whether you have experienced symptoms such as breathlessness, unusual fatigue, dizziness or palpitations. If you notice a persistent or unexplained decline, schedule a consultation with your doctor and discuss whether further evaluation, including an echocardiogram, may be appropriate.

The question is simple: What have you stopped doing, and could your health be the reason? Taking that first step can help you understand the change and decide what to do next.

(By Dr. Sumanto Mukhopadhyay, a Senior Consultant Interventional and Structural Cardiologist, Apollo Hospital, Kolkata)

In a shocking viral trend, women in Kenya are reportedly inserting cetirizine, an allergy medication, into their vaginas in an attempt to achieve vaginal tightening and enhance sexual pleasure.

The practice has prompted warnings from pharmacists and health authorities, who caution that the drug is not meant for vaginal use and could pose health risks.

The Pharmaceutical Society of Kenya (PSK) has warned against the practice, stating that the medicine is not intended for vaginal use.

"Cetirizine is an allergy medicine, taken by mouth. It is not approved or tested for any other purpose, and definitely not for vaginal use," the PSK said in a statement issued on Thursday.

It advised women who had tried the practice to stop and seek medical attention if they experienced pain, bleeding, burning, itching, unusual discharge or fever.

What Is The Cetirizine Vaginal Tightening Trend?

Also read: Is Your Allergy Medicine Safe? FDA Recalls Antihistamine Tablets Over Life-Threatening Contamination Concerns

Posts circulating on Kenyan social media, particularly TikTok, claim that cetirizine can reduce vaginal moisture and create a sensation of tightness during sex, BBC reported.

The claims have sparked online debate, with some users endorsing the practice and others questioning its safety.

The trend has also reportedly increased demand for the drug, with local media reporting price rises and shortages at some pharmacies in Nairobi.

What Is Cetirizine And Why Is Its Misuse Dangerous?

Cetirizine is an oral antihistamine used to relieve allergy symptoms such as sneezing, runny nose, itchy eyes and hives.

Kenya's Pharmacy and Poisons Board (PPB) clarified in a public safety alert issued on November 4 that cetirizine is used to treat allergic rhinitis and urticaria. It is intended for oral use and should be taken only as directed by a healthcare professional.

The Board stressed that "the drug is not approved for vaginal use or tightening and that no established scientific evidence supports such claims".

On the other hand, inserting the tablets may cause vaginal irritation, burning, soreness, pain and discomfort. It may also disrupt the vagina's natural protective environment and increase infection risk.

The PSK cautioned against confusing dryness with tightening.

"Dryness is not tightness... instead, it may increase friction, discomfort, and the risk of tissue injury," it said.

Taking more than the recommended cetirizine dose can also cause excessive sleepiness, dizziness, restlessness, confusion, shaking, a rapid heartbeat and difficulty passing urine, the PPB warned.

Kenya's Health Ministry Raises Concern

Read More: California Reports 4 Cases Of Deadly Clade I Mpox virus: What To Know About Local Transmission Risk

Kenya's health ministry had also flagged the trend a day earlier. Ouma Oluga, a senior health official, expressed concern that social media users were dismissing medical warnings without considering the consequences, the BBC reported.

He suggested that authorities could introduce a system to monitor medicine distribution and purchases to identify potential misuse. No formal decision has been announced.

Pharmacists Warn Of Shortages And Misuse

The PSK said it had received reports of increased cetirizine demand, rising prices and shortages at some pharmacies.

It urged retailers not to exploit the trend, warning that people who need the drug for allergies could struggle to access it. Pharmacists were also advised against knowingly dispensing medicines for misuse.

The PPB urged women not to insert cetirizine or other oral medicines into the vagina and to consult healthcare professionals about vaginal dryness or sexual health concerns rather than follow unverified online advice.

Delhi's air quality remained in the Very Poor category on Thursday, with an AQI of 369 as pollution levels continued to rise across the Capital. With Diwali celebrations with firecracker fuel smoke to an already polluted city, concerns about respiratory health are mounting. The timing is alarming as it also coincides with the flu season, when respiratory infections are also circulating.

While air pollution and influenza both affect the respiratory system, it can put additional stress on the lungs. Pollutants can irritate the airways, trigger inflammation and weaken the lungs' natural defence mechanisms, while the influenza virus infects the respiratory tract.

Together, they can aggravate respiratory symptoms and make breathing more difficult, especially in people with pre-existing lung conditions.

According to Dr. Arup Halder, Consultant Pulmonologist at CK Birla Hospitals, CMRI Kolkata, prolonged exposure to air pollution can weaken the respiratory system's immunity.

“Exposure to air pollution, especially for long durations, can weaken the respiratory system's immunity. Fine particulates can become lodged in airways and damage the mechanisms the body has to protect itself. This makes respiratory infections much more likely, especially if viral in nature,” he told HealthandMe.

Dr. Suresh Sagadevan, Senior Interventional Pulmonologist at Gleneagles Hospital, Chennai, told HealthandMe that pollution can also interfere with the lungs' natural cleaning mechanisms.

He said that the respiratory tract contains tiny hair-like structures called cilia, which help remove dust and germs. Polluted air can affect their functioning, making it easier for respiratory viruses to infect the airways. However, pollution does not directly cause influenza nut it can compromise the respiratory system's ability to defend itself against such infections.

What Happens When Particulate Matter And Flu Affect The Lungs Together?

Also read: Delhi Air Pollution: Feeling Anxious As AQI Rises? Experts Explain The Mental Health Toll Of Breathing Toxic Air

Particulate matter and influenza together can intensify inflammation in the respiratory system.

Fine particulate matter, like PM2.5, can penetrate deep into the lungs. It can cause inflammation and oxidative stress. At the same time, influenza viruses infect the cells lining the respiratory tract.

"When both exposures occur together, the existing inflammation can become more intense, potentially worsening coughing, breathing difficulty and airway irritation. In simple terms, the lungs are dealing with two different stresses at the same time," said Dr. Sagadevan.

Dr. Halder added that PM2.5 can also interfere with the body's ability to ward off irritants from the respiratory tract, while influenza can make breathing challenging.

Facing both together can be challenging for people whose respiratory or immune systems are already compromised.

Can Diwali Pollution Make Flu Symptoms Worse?

Also read: Air Pollution In Delhi: Experts Warn Of Red Eyes, Itching, Watering In Children

Firecracker smoke can aggravate an already infected and overwhelmed respiratory system. People with flu may experience excessive coughing, wheezing, chest tightness and breathlessness when they get exposed to high levels of pollution.

"Increased Diwali-related pollution will definitely worsen respiratory symptoms for individuals with the flu, especially during this period. The gases and particulate matter from firecracker smoke can lead to chest congestion and difficulty in breathing. In some cases, the pollution can worsen existing asthma and other lung-related conditions and trigger respiratory issues," said Dr. Halder.

Dr. Sagadevan said that people with asthma, chronic obstructive pulmonary disease (COPD) and other pre-existing respiratory conditions need to be particularly careful by limiting exposure.

Who Is Most Vulnerable When Flu Season Coincides With High Pollution?

Certain groups of people may face a greater risk when respiratory infections coincide with elevated pollution levels. These include:

• Children: Their lungs are still developing, making them more vulnerable to air pollution.

• Older adults: Age-related changes can reduce respiratory capacity and make it harder to cope with added stress on the lungs.

• Pregnant women: They need to take extra precautions against respiratory infections and environmental pollutants.

• People with asthma or COPD: Pollution can trigger flare-ups, worsen airway inflammation and aggravate breathing difficulties.

• Immunocompromised individuals: A weak immune system can make it harder to fight infections and increase the risk of severe illness.

Dr. Halder explains that older adults and people with weak immunity may be more susceptible to more serious flu symptoms. Meanwhile, those with existing lung conditions may experience worsening respiratory symptoms even with short periods of pollution exposure.

Pollution Effects Vs Flu: Symptoms

Also read: Supreme Court Allows Green Crackers In Delhi-NCR Ahead Of Diwali: Are They Really Safe For Your Health?

Pollution-related respiratory irritation and influenza can lead to similar symptoms, making it difficult to distinguish between the two. However, their onset and symptoms can differ.

Pollution-related irritation develops shortly after exposure to polluted air. Common symptoms include:

• Throat irritation or discomfort
• Burning or watering eyes
• Dry cough
• Sneezing
• Wheezing
• Chest discomfort

Flu, on the other hand, is a viral infection that mostly causes a sudden onset of symptoms, including:

• Fever
• Body aches and muscle pain
• Headache
• Fatigue
• Cough
• General weakness

"However, both can occur together, and symptoms may overlap. Persistent fever, worsening breathlessness or significant weakness should prompt medical evaluation," says Dr. Sagadevan.

Dr. Halder also recommends consulting a medical professional when symptoms make it difficult to determine whether the problem is pollution-related irritation or an infection.

How To Protect Your Lungs During Diwali And Flu Season

Reducing exposure to polluted air and taking precautions against respiratory infections can help protect lung health during the festive season.

Both doctors recommend the following measures:

1. Limit outdoor exposure: Avoid spending long periods outdoors, especially after firecracker bursting and during periods of heavy smoke.

2. Wear a well-fitting N95 mask: If you need to step outside when pollution levels are high, use a properly fitted N95 mask to reduce exposure to fine particulate matter.

3. Keep windows closed: Close doors and windows during periods of heavy smoke to limit the entry of outdoor pollutants. Ventilate indoor spaces when outdoor air quality improves.

4. Avoid outdoor exercise: Vigorous physical activity increases the amount of air you breathe in, increasing exposure. Avoid exercising outdoors when air quality is poor.

5. Avoid firecrackers and second-hand smoke: Staying away from firecracker smoke can reduce exposure to harmful pollutants.

6. Get vaccinated against influenza: Stay up to date with flu vaccinations to reduce the risk of influenza and its complications.

7. Maintain hand hygiene: Wash your hands regularly for infection prevention.

8. Seek medical attention: Do not ignore worsening fever, cough, wheezing or breathing difficulties, especially if you have an existing respiratory condition.

Dr. Sagadevan concludes, "Air pollution and influenza can independently affect respiratory health, but their coexistence can place additional stress on the lungs. During the festive season, protecting our lungs through pollution avoidance, vaccination and timely medical care should be a priority."