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.

Crossing 40 often brings subtle but noticeable changes in how your body feels and functions. Many people brush off early signs like morning stiffness, reduced flexibility, or frequent bathroom visits, not realizing these are part of natural age-related changes. These shifts primarily affect the bones, joints, and urinary system, areas that quietly define everyday comfort.

According to Dr. Aashish Chaudhry, Managing Director & Head, Orthopedics & Joint Replacement, Aakash Healthcare, these changes are expected but shouldn’t be ignored. “After 40, the body’s regenerative capacity slows down, particularly in bones and joints. Being aware of these changes helps in early prevention and better long-term outcomes,” he says.

Bone Health: Slower Regeneration and Higher Risk of Fractures

Bone density gradually declines with age due to hormonal changes. Women experience a drop in estrogen, and men see reduced testosterone levels—both crucial for supporting bone formation.

“Lower hormone levels weaken the natural bone-building cycle,” explains Dr. Chaudhry. “This increases the risk of fractures and even slows down healing when injuries occur.”

Key concerns include:

• Reduced bone density
• Higher risk of osteoporosis
• Slower fracture recovery

To counter this, weight-bearing exercises and strength training are crucial. A diet rich in calcium, vitamin D, and protein supports bone metabolism and maintains strength.

Joint Health: Wear, Tear, and Early Stiffness

Years of repetitive movements, combined with declining collagen production, make joints more vulnerable. Cartilage becomes less elastic, leading to stiffness, reduced mobility, and the early onset of osteoarthritis.

“Many people notice joint pain but assume it's just fatigue,” says Dr. Chaudhry. “In reality, early joint wear can be detected and managed much earlier with the right interventions.”

What contributes to joint discomfort after 40?

• Natural wear and tear
• Reduced cartilage elasticity
• Slower lubrication of joint spaces
• Early degenerative changes

Flexibility-focused exercises like yoga or stretching, along with anti-inflammatory foods such as leafy greens, berries, nuts, and omega-3 sources, can ease stiffness and protect long-term mobility.

Urinary Changes: More Common Than You Think

While both men and women experience changes in urinary patterns, men often notice symptoms more prominently due to prostate enlargement. A bigger prostate narrows the urinary passage, causing:

• Frequent urination
• Weak urinary stream
• Urgency or incomplete emptying
• Night-time urination

Women, on the other hand, may struggle with pelvic floor weakness, leading to leakage or urgency.

Dr. Chaudhry notes, “These symptoms are common after 40, but they shouldn’t be normalized. Early evaluation can prevent chronic discomfort.”

Hydration remains essential. Cutting back on caffeine, alcohol, and salty foods can also lighten urinary symptoms and prevent kidney irritation.

Lifestyle Adaptations That Make a Real Difference

Shifting from reactive to preventive care is key after 40. The goal isn’t to stop ageing—it's to age comfortably and confidently.

What helps:

• Strength and mobility exercises
• Pelvic floor training
• Maintaining a healthy weight
• Regular health screenings (bone density, kidney tests, prostate evaluation)
• Stress management through yoga, meditation, or deep breathing
• Consistent sleep routines to support tissue repair

“Think of this stage as preparing your body for the next decades,” says Dr. Chaudhry. “With the right lifestyle adjustments, most people can maintain excellent mobility and function well into older age.”

After the Thanksgiving, on Friday, the Food and Drug Administration (FDA)'s top vaccine regulator, Vinay Prasad made a clam that shocked the public-health established. "For the first time, the US FDA will acknowledge that COVID-19 vaccines have killed American children," he wrote in a leaked email to his staff, as reported by The Atlantic and The Washington Post.

The agency has identified that at least 10 children died after getting COVID shots.

The email has been perceived by physicians as a "threat". A response from 12 former FDA commissioners, published in The New England Journal of Medicine on Wednesday, called Prasad's memo "a threat to evidence-based vaccine policy and public health security". All of the potential vaccine related deaths reported to government were already reviewed by the agency's staff, and had reached "different conclusions", wrote the former commissioners.

Elsewhere, doctors and scientists have declared that there are no evidence that links COVID-19 vaccines to deaths in children. The commissioners have claimed that in an attempt to deliberately bring evidence, Prasad and his colleagues had engaged in an "evidence-manufacturing mission", a "dumpster dive" for shoddy data, or worse, a campaign of lying.

Prasad is one of several public health officials who, under Robert F. Kennedy Jr.’s leadership, have been steadily chipping away at public trust in vaccines. So far, he has not provided evidence to back his claims, and his estimate of vaccine-related deaths may be exaggerated. The memo’s intense language and focus on political complaints also cast doubt on his assertions.

However, something that cannot be ignored is that fact that his memo may have provoked people to deny even the possibility of COVID-vaccine-related deaths. The Atlantic notes that "the idea that mRNA-based shots have, tragically, killed a very small number of children is not far-fetched." The article written by Benjamin Mazer, a physician who specializes in pathology and laboratory, notes that the this does not imply a "catastrophic threat to public health" as tens of millions of doses of the same vaccines have saved young people.

Understanding the Debate Of Vaccine-Linked Deaths

Public-health experts agree that COVID vaccines, like all medical treatments, can cause side effects. Myocarditis, a rare heart inflammation seen mostly in adolescent boys and young men after mRNA shots, remains the most discussed risk. Although usually mild and far less severe than virus-induced myocarditis, a few deaths have been documented worldwide, including isolated cases in the U.S., South Korea, and two American teenagers described in a peer-reviewed report.

These findings fuel ongoing debate about whether extremely rare vaccine-related deaths are being overlooked. Some scientists, including Paul Offit and Michael Osterholm, say the evidence does not prove the vaccines caused these deaths, noting that population-level studies show no rise in mortality after vaccination. Others argue that well-investigated autopsy-confirmed cases should be taken seriously rather than dismissed outright.

Experts such as Krutika Kuppalli, as cited by Mazer, emphasize that even if deaths occur, they are so uncommon they do not appear statistically, while the benefits, significantly reduced COVID mortality, are unmistakable. However, individual cases still raise questions on health authorities and the stricter standards of proofs they have applied when vaccines were involved to create a room for skepticism.

The concern is that rare side effects of vaccines could go undiscovered and not that vaccinations are inherently harmful.

Are you down with fever? Are your symptoms also a little less common from an ordinary cold? Are you also confused between flu and COVID? Then knowing this one symptom could help you set flu apart from COVID. Dr Rupa Parmar, a GP and medical director at Midland Health tells The Mirror, that shortness of breath could be a key symptom that could differentiate between the two.

Dr Parmar highlights that it is a key indicator for COVID. "Shortness of breath is rare in both a cold and the flu, but as COVID more so affects the lungs due to inflammation, it is a common symptom."

The NHS website supports her advice, noting that breathlessness is a symptom more often tied to Covid, not the flu or a common cold. This kind of breathing difficulty is usually associated with infections like Covid or respiratory syncytial virus (RSV).

What Else Could Help You Know If You Have A COVID or Flu?

The nature of your cough could also help you understand different ailments. Dr Parmar said that a cold would produce a mild cough, whereas a flu cough could be more dry. However, with covid, "a cough will be dry and continuous, and many people will cough for more than an hour or have three or more coughing episodes within a day."

If one has lost their sense of smell or taste, then the chances are, this could be COVID. However, this symptom is also present in cold or in a flu.

For people who have Covid, the NHS advises staying home and avoiding contact with others if they or their children have symptoms and either develop a high temperature or feel too unwell to work, attend school, manage childcare, or carry out daily activities. If you are unsure about the cause, it is important to speak with a doctor.

Dr Parmar emphasized: "after all, it is always better to be safe than sorry when it comes to health."

What Is Flu?

The flu is a common respiratory illness that happen from the influenza virus. The common flu symptoms are:

• Fever
• Sore Throat
• Runny Nose
• Fatigue
• Body Aches
• Cough
• Headaches

What Is COVID-19?

As per the US Centers for Disease Control and Prevention (CDC), COVID-19 is a respiratory illness caused by the coronavirus. The common symptoms include:

• Fever
• Cough
• Fatigue
• Headache
• Nausea
• Sore Throat
• Runny Nose
• Loss of smell or taste

COVID-19 could also have some long-lasting symptoms unlike flu or cold, that could seem unrelated to the original infection.

As per the Ohio State University, the most recent COVID variant is XFG or the Stratus variant. Another new variant that causes the 'razor blade' like sore throat is Nimbus.

The symptoms of this new variant includes:

• Congestion
• Cough
• Fever
• Headache
• Sore throat
• Muscle Aches

'Razor blade' Throat

NB.1.8.1 or the Nimbus variant is a subvariant of Omicron, which is a dominant COVID variant since late 2021. Omicron variants tend to cause more throat problems than the other variants seen earlier.

The COVID virus binds to ACE2 receptors. According to WebMD, the cells in your nose and throat contain more ACE2 receptors than those deeper in the lungs, which makes them easier targets for Omicron variants. Once the virus attaches to these receptors in the upper airway, your immune system begins to respond.