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.

Fewer people are dying of heart disease, however, as per a new report from the American Heart Association (AHA), it is still the leading cause of death in the US. While the report noted a drop in rates of deaths by heart diseases for the first time in five years, the report also noted that it kills more American than any other condition. The report was published early Wednesday in the journal Circulation.

What Did The AHA Report Reveal?

The report found that annual rates of heart disease deaths have in fact decreased by 2.7% between 2022 and 2023. This means it went from 941,652 to 915, 973. However, cardiovascular diseases still killed more people in the US than cancer and accidents combined.

The report found that deaths caused by blockages in the coronary arteries, the blood vessels supplying the heart, fell by 5.9%, dropping from 371,506 to 349,470 over the same period. Coronary artery disease, a major cause of heart attacks, still claims two lives every three minutes. Other vessel-damaging chronic conditions also remain widespread.

The report found that the share of U.S. adults with high blood pressure edged up to 47.3%, while overall obesity rates dipped slightly to 50%. However, obesity is increasing among children and teenagers, rising from 25.4% to 28.1% in those aged 2 to 19.

Prevention remains the most powerful tool to reduce heart disease deaths, experts say. Because heart disease cannot be cured, waiting for symptoms often means focusing only on treatment rather than stopping the problem early. Early prevention, by contrast, has a much bigger impact on saving lives.

The report highlights four key lifestyle habits for heart health: eating a balanced diet, staying physically active, getting enough sleep and avoiding tobacco. It also stresses four important health measures: managing weight, cholesterol, blood sugar and blood pressure.

Together, these eight factors could prevent up to 40% of heart disease deaths and cut the risk of developing serious heart disease symptoms by as much as 74%. These same habits also benefit the brain, helping slow brain ageing and lower the risk of dementia, especially by keeping blood pressure under control.

Heart Health Is Also an Economic Issue

Cutting down cardiovascular disease in the U.S. would not only help people live healthier lives, it could also ease the strain on the economy, experts say. Heart disease carries a massive financial cost, with an estimated $414.7 billion spent each year on direct treatment and indirect losses between 2021 and 2022.

Even though the benefits of healthy habits are well known, getting people to prioritize heart health remains difficult. Only one in four U.S. adults meets national guidelines for both aerobic and muscle-strengthening exercise. Control of chronic conditions is also lacking, with less than half of Americans with type 2 diabetes managing their disease effectively.

Experts stress that regular physical activity, tailored to individual ability, can make a real difference. Simple, consistent movement and timely health checkups can go a long way in protecting both personal health and the wider economy.

Britons who regularly take a commonly used supplement are being urged to cut back if they notice four particular symptoms, as excessive intake can be dangerous and, in some cases, life-threatening. Vitamins and minerals are essential for keeping the body functioning properly. While most nutrients should ideally come from a healthy, balanced diet, many people choose to top up their intake with supplements.

Iron is one such supplement. This mineral plays a key role in making haemoglobin, the substance in red blood cells that carries oxygen around the body. When iron levels are too low, it can lead to iron deficiency anaemia. This condition may cause symptoms such as constant tiredness, low energy, shortness of breath, and heart palpitations. To avoid this, some people turn to iron supplements.

Could You Be Overdoing Iron Supplements?

The NHS has issued guidance on its website, warning that taking “too much” iron can cause side effects. These include:

• Constipation
• Feeling sick
• Being sick
• Stomach pain

If these symptoms appear, it may be a sign that your iron intake needs to be reduced. In children, taking too much iron can be particularly dangerous and may even be fatal.

The NHS states: “Very high doses of iron can be fatal, particularly if taken by children, so always keep iron supplements out of the reach of children.” For adults, a high dose of iron is classed as more than 20mg.

How Much Iron Do You Need?

• 8.7mg a day for men aged 19 and over
• 14.8mg a day for women aged 19 to 49
• 8.7mg a day for women aged 50 and over
• Women who continue to have periods after the age of 50 may need the same amount of iron as women aged 19 to 49

The Department of Health and Social Care (DHSC) says that “most people” should be able to meet their iron needs through a varied and balanced diet. But for those who do take supplements, the NHS advises: “Do not take too much as this could be harmful.”

It adds that taking 17mg or less of iron supplements each day is “unlikely” to cause harm. The guidance continues: “But continue taking a higher dose if advised to by a GP.”

Good sources of iron include:

• Liver (but this should be avoided during pregnancy)
• Red meat (though the DHSC advises limiting red and processed meat due to a possible link to bowel cancer)
• Beans, such as red kidney beans, edamame beans, and chickpeas
• Nuts
• Dried fruit, including dried apricots
• Fortified breakfast cereals
• Soybean flour

Symptoms Of Iron Deficiency Anaemia

• Tiredness and low energy
• Shortness of breath
• Noticeable heartbeats, also known as heart palpitations
• Skin that appears paler than usual
• Headaches
• Ringing, buzzing, or hissing sounds in the ears or head, known as tinnitus
• Food tasting unusual
• Itchy skin
• A sore tongue
• Hair loss, with more hair coming out during brushing or washing
• Craving non-food items such as paper or ice, a condition called pica
• Difficulty swallowing, known as dysphagia
• Painful open sores at the corners of the mouth
• Changes to the nails, including spoon-shaped nails
• Restless legs syndrome

People in the UK who take a commonly prescribed medication are being reminded to follow a strict cut-off time. Ignoring this guidance could lead to disrupted sleep.

What Is Bumetanide?

Bumetanide is a diuretic, a type of medicine that helps the kidneys remove excess salt and water by increasing urine production. In the UK, it is prescribed for heart failure, a condition that affects close to one million people. Bumetanide is only available with a prescription and comes in tablet form as well as a liquid that is taken by mouth.

Bumetanide: NHS Says Avoid Taking It After 4 PM

The NHS website lists several key points patients should be aware of when using bumetanide. One of the most important relates to timing. According to NHS advice, bumetanide should not be taken after 4pm, as doing so may cause frequent urination during the night.

The NHS states: “Do not take bumetanide after 4pm or you may have to wake up in the night to go to the toilet.” Alongside this warning, the guidance also includes recommendations on when to take the medicine and what foods to avoid.

“You'll usually take bumetanide once a day, in the morning or afternoon – or twice a day, in the morning and afternoon,” the NHS explains. “Most people need to pee about 30 minutes after taking bumetanide, and again within a few hours.” The NHS also advises avoiding foods high in salt, such as processed foods or ready meals, as well as salt substitutes like Lo Salt, as these can interfere with how the medicine works. However, it adds: “You can take bumetanide with or without food.”

Some people are advised to take extra care when using bumetanide. The NHS says it is important to inform your doctor if you have:

• Ever had an allergic reaction to bumetanide or other medicines
• Low blood pressure (hypotension)
• Signs of dehydration, including thirst, a dry mouth, or dark-coloured urine
• Liver disease
• Diabetes
• Difficulty passing urine
• Gout

If you are due to have a glucose test, you should also let your doctor know that you are taking bumetanide.

Bumetanide: Common Side Effects

There are several common side effects associated with bumetanide that occur in more than one in 100 people. The NHS says there are ways to manage these symptoms:

• Needing to urinate more often than usual
• Feeling thirsty
• Dry mouth
• Headaches
• Feeling dizzy or confused
• Muscle cramps or muscle weakness

Patients are advised to speak to a doctor or pharmacist if the suggested coping measures do not help, or if side effects continue or worsen after a few days.

Bumetanide: Serious Side Effects

Serious side effects are uncommon, according to the NHS. However, you should contact your doctor or call 111 immediately if you experience:

• Unexplained bruising or bleeding, a high temperature, sore throat, or mouth ulcers, which may indicate a blood disorder
• Ringing in the ears (tinnitus) or hearing loss

The NHS also notes: “In rare cases, it's possible to have a serious allergic reaction (anaphylaxis) to bumetanide.” In 2023, the UK faced a national shortage of bumetanide, which was expected to ease in 2025.

Because of this shortage, many patients were switched to furosemide, another diuretic that is also subject to the same 4pm timing advice.

Disclaimer: This article is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider regarding any questions about medications, health conditions, or before making changes to your treatment plan.