The main cause of death globally is still heart disease. Heart attacks may occur suddenly without any warning signs. However, in the film industry, intense chest pain would be portrayed for a heart attack. In actuality, many patients have slight symptoms that go unnoticed until the time of their heart attack days or even weeks prior to that.

Heart attacks do not always announce themselves with dramatic chest pain. Often, they manifest in subtle, easy-to-dismiss ways. Recognizing these overlooked warning signs and taking proactive steps toward cardiovascular health can save lives. If you or someone you know experiences any of these symptoms, seeking immediate medical care is crucial. Prioritizing heart health today can help prevent life-threatening complications in the future.

Warning Sings of A Heart Attack

1. Discomfort Pressure in the Chest

One of the earliest and most common warning signs of an impending heart attack is pressure, tightness, or fullness in the chest. This pain is not typically sharp and sudden, like most people associate with a heart attack, but it can be intermittent, coming in waves, and lasting for several minutes before fading away. According to the American Heart Association, this is one of the red flags when accompanied by exertion. If you have persistent chest pressure, you should call emergency services immediately.

2. Pain Radiating to Other Parts of the Body

The well-known symptom of chest pain can also manifest discomfort related to a heart attack as pain radiating to other parts of the body. It is not unusual for people experiencing this kind of heart attack to report feeling pain in the shoulders, arms, back, neck, and even jaw. The vagus nerve is one that connects the heart to the brain, abdomen, and neck. The pain may be referred to these regions. In case you experience a sudden, unexplained pain in these regions, especially when exercising, seek a doctor's opinion.

3. Dizziness and Lightheadedness

Feeling dizziness upon standing up quickly or missing a meal is common, but unexplained dizziness often with chest pain or shortness of breath is the first sign of heart attack. Sudden hypotension can seriously decrease the blood supply to the brain and cause dizziness. Dizziness that does not go away on its own should not be ignored.

4. Unexplained Fatigue

It often happens that excessive tiredness, particularly in a busy lifestyle, is considered trivial, but ongoing fatigue, mostly in women, is a predictor of heart failure. According to some studies, extreme fatigue often starts a month before a heart attack, primarily in women. This is simply because the heart cannot pump well enough, leaving insufficient oxygen available to muscles and organs. Consult a healthcare professional if you become increasingly tired over time, yet are getting all the rest in the world.

5. Nausea, Indigestion, or Stomach Pain

Digestive problems like nausea, vomiting, or indigestion are often mistaken for acid reflux or food poisoning. However, these symptoms can also indicate reduced blood flow to the digestive tract, a common precursor to heart attacks. If you experience gastrointestinal distress alongside other symptoms like dizziness or chest discomfort, it's important to seek medical advice immediately.

6. Cold Sweats and Excessive Perspiration

Without apparent reason, a heart attack might be signaled by sudden sweating without any exercise or hot weather conditions. The heart's inability to function properly creates the body's "fight or flight" reaction, which means excessive sweating will occur. Be aware of your body and never ignore a cold sweat, particularly if it coincides with other symptoms.

7. Heart palpitations or irregular heartbeat

A racing or irregular heartbeat can be a normal reaction to stress or caffeine consumption. However, regular or unprovoked heart palpitations may indicate that the heart is under duress. If the heart is not getting enough oxygen-rich blood, it can start to beat irregularly. If you experience palpitations along with dizziness, chest pain, or shortness of breath, you should see a doctor right away.

8. Shortness of Breath

If suddenly climbing stairs or performing other everyday activities becomes a problem, then there may be a heart issue. Shortness of breath usually occurs with heart conditions because the circulation is not adequate and less oxygen is provided to the lungs. This symptom can occur either with or without chest pain and is an important indicator of the presence of underlying heart disease. If you find yourself experiencing sudden unexplained breathlessness, then seek a healthcare provider as soon as possible.

When to Seek Medical Attention

Early detection of these symptoms and early intervention can help avoid a life-threatening heart attack. You should visit a doctor if you feel the following symptoms:

• Symptoms induced by exertion and relieved by rest
• The simultaneous onset of several warning signs, including weakness, dizziness, and nausea
• Personal or family history of heart disease, hypertension, diabetes, or smoking

Preventing Heart Attacks: Proactive Steps for Heart Health

Although heart attacks may come out of nowhere, lifestyle plays an important role in reducing a patient's risk; here are some heart-healthy habits to consider:

Take on a Heart-Healthy Diet: Focus on consuming whole foods, lean proteins, healthy fats, and fiber-rich fruits and vegetables. Try to limit processed foods, saturated fats, and added sugars.

Stay Active: Engage in at least 30 minutes of moderate physical activity most days of the week to strengthen your heart and improve blood circulation.

Smoking. Smoking is probably the single largest risk factor for heart disease. If you are a smoker, quitting can easily be the single best thing you can do to improve your heart health.

Deal with Stress: Chronic stress leads to heart disease. Relaxed people through various relaxation techniques including yoga, meditation, and even deep breathing, have lesser stresses.

Regular health checks Monitor blood pressure, cholesterol levels, and blood sugar on a regular basis. The risk factors' early detection can help avoid serious complications.

Humans and most mammals have two sex chromosomes, X and Y. Females typically have two X chromosomes (XX), while males typically have one X and one Y chromosome (XY). As men age, many of their cells gradually lose the Y chromosome, due to a common genetic change.

Research has shown that cancer incidence and mortality rate are more among men than women. A new study may offer clues as to why.

Researchers from the University of Arizona found that loss of the Y chromosome in men’s tissues could create conditions that allow cancer to develop.

The research, published in JCI Insights, found that Y chromosome loss creates a pre-neoplastic field effect — a hidden zone of genetic vulnerability in normal-appearing tissue that may provide fertile ground for cancer development.

What Did The Study Find?

Also read: US Cancer Death Rates Fall For Men, Women: Lung Cancer Progress Drives Decline

Previous studies have linked loss of the Y chromosome in blood cells to an increased risk of disease. The new study systematically profiled Y chromosome loss across normal, precancerous and cancerous tissues from 11 major human organs.

“We were able to show that the loss of the Y chromosome is found in normal-appearing tissues adjacent to a tumor,” said physician-scientist Dr. Dan Theodorescu of the University of Arizona Cancer Center.

“That finding is what makes this discovery so exciting. It suggests we may be looking at one of the earliest signposts of cancer forming.”

The team analyzed 1,000 tissue samples from 405 men, using an automated fluorescent imaging system to examine more than 4.3 million individual cell nuclei and measure the ratio of Y to X chromosomes.

In one part of the study, researchers created detailed maps of bladder tissue removed during cancer surgery.

The maps showed that Y chromosome loss increased as tissue progressed from normal tissue to early abnormal cells and then to cancer.

Y chromosome loss in normal-appearing tissue was highest in samples from colon, rectal, esophageal, pancreatic and lung cancers.

“We are now thinking of this as a gradient, similar to a hillside that slowly gets steeper,” Theodorescu said. “The closer the tissue is to a cancer, the more Y chromosome loss we see. That gradient could one day help doctors suspect trouble in biopsies that miss a smaller cancer.”

How Y Chromosome Loss May Affect Cancer

Read More: UK NHS Trust To Review 4,500 More Breast Cancer Cases After 20 Unnecessary Mastectomies

Theodorescu’s previous research examined how loss of the Y chromosome in cancer cells can help them evade the immune system. This may help explain why Y chromosome loss has been associated with higher mortality from certain carcinomas.

What Does The Y Chromosome Do?

The Y chromosome spans more than 59 million DNA base pairs and accounts for almost 2% of the DNA in human cells. It contains roughly 70 to 200 genes involved in protein production.

The chromosome contains genes that play important roles in male sex development and fertility, including sperm production.

Beyond reproduction, research suggests that the Y chromosome can influence immune and inflammatory responses in men, potentially affecting susceptibility to certain diseases.

READ: Multicancer Blood Test Detects 17 Cancer In A Large Study: Can It Replace Mammograms & Colonoscopies?

Cancer Risk In Men

Globally, cancer is diagnosed more often in men than in women, with men having roughly a 25% higher incidence rate. Men also account for a greater share of cancer deaths worldwide.

Some of the most common cancers affecting men include prostate, lung, colorectal and skin cancers. Early detection and appropriate screening can improve the chances of successful treatment for several types of cancer.

Shortness of breath can happen for many reasons. Low activity, extra pounds and long hours of sitting can all play a role. But ongoing symptoms may be due to asthma or other lung problems. It can be linked to anemia as well. Heart problems are another possibility, along with other conditions that involve the lungs or the heart and blood flow. Sometimes breathing trouble shows up before other clear signs appear.

Why Do You Feel Breathless

A clinician will try to sort out what is going on by looking at your pattern of symptoms. They may ask how fast it happens, when it begins and if it’s getting worse over time. They also inquire about other symptoms, such as pain or tightness in the chest, a persistent cough, wheezing, feeling lightheaded, unusual tiredness or swelling of the legs. A careful history and a physical exam can guide the next steps and whether tests are needed.

More detailed checks are now available for breathlessness that has no clear cause. What gets done depends on what the doctor suspects. You might have oxygen level checks, blood tests, breathing tests, chest scans, an ECG, or an echocardiogram. In some cases, doctors may suggest a more focused look at the airways, such as bronchoscopy, or other procedures to find a specific problem and address it.

Try not to panic every time you feel short of breath. Instead, pay attention to how your breathing has been changing from your normal pattern. If simple daily tasks that used to feel fine suddenly make you unusually breathless, or if the symptoms do not go away and start to get worse, it is a good idea to get checked by a clinician. Getting help sooner can support an early look at what is causing it and can help set up the right care.

(By Dr Anjan Siotia, Director of Cardiology at BM Birla Heart Hospital)

Quitting smoking may give your lungs a chance to recover, but not all damage can be reversed. On World Lung Day, doctors explain the healing process in all kinds of smokers, from those who have one cigarette per week to those who went through ten packs a day.

Find out why former smokers cough more after quitting, and when lung damage becomes irreversible.

Every cigarette exposes the lungs to a mixture of toxic chemicals that can cause inflammation of the airways, deteriorate their natural cleaning system and, over time, damage the lung tissue itself.

Some effects of smoking can improve substantially after quitting. Airway inflammation may settle down, excess mucus can decrease, the cilia that clear particles from the respiratory tract can regain function, and symptoms such as cough and breathlessness may improve. Quitting also stops the continued exposure responsible for the accelerated loss of lung function.

But when smoking has already destroyed lung tissue, particularly in emphysema, the damage cannot simply be reversed.

“Smoking-related lung damage is not an all or none phenomenon,” Dr Swapneel Mehta, Sr. Consultant, Pulmonology, Dr LH Hiranandani Hospital, Mumbai told HealthandMe.

“The lungs do begin to recover after the last cigarette, although the extent of recovery depends on how much damage has already occurred.”

The Recovery Process Starts Soon

Although different parts of the respiratory system recover at different rates and speed, the body starts responding after you quit smoking almost immediately.

In a conversation with HealthandMe, Dr Tejveer Singh, HOD, Respiratory, Sleep Medicine & Interventional Pulmonology, Bhagwan Mahavir Manipal Hospital, Ranchi, said carbon monoxide levels in the blood start falling within hours of quitting. This allows oxygen to be transported more effectively.

Over the following days and weeks, irritation and inflammation in the airways can gradually decrease. Cough, phlegm and breathing difficulties may subsequently improve.

Dr Prasanna Kumar T, HOD & Consultant, Respiratory Medicine, Ramaiah Memorial Hospital, told HealthandMe about the changes in the lungs' mucociliary clearance system, which helps remove mucus and inhaled particles from the airways. He said studies have found measurable improvement in mucociliary clearance after smoking cessation, with some research reporting significant improvement within the first month and further gains over longer periods.

He said, “Ciliary and mucociliary functioning, the recovery starts and there are certain studies that were published shows that nasal mucociliary escalator or clearance which may return to normal range by day 15 post stopping smoking with benefit sustained to up to 180 days, that is 6 months. Well, there are other studies which also show that 63% of the people who quit smoking showed significant improvement in this mucociliary clearance at end of one month raising up to 85% at the end of 12 months.”

He added, “So, there is definitely a measurable gain in the lung function which is measured by spirometry and there is reductions in the cough and the breathlessness which is actually the basic symptomatology which will typically emerge over 2 weeks to 3 months as there is evolution of airway inflammation and bronchospasm can also subside.”

Also read: FDA To Speed Up Approval Process For Vapes & Nicotine Pouches: Does It Mean They Are Safer Than Cigarettes?

Quitting Can Make You Cough More At First

The lungs have their own cleaning system. Mucus traps dust, microorganisms and other inhaled particles, while microscopic hair-like structures called cilia move that mucus upwards, allowing it to be coughed out or swallowed. Smoking damages this system, reducing the effectiveness of ciliary movement.

Once smoking stops, ciliary function can gradually recover. As the airways become better at moving accumulated mucus and particles out, coughing and sputum production can temporarily increase. Dr Singh said this is an important distinction for people who have recently quit.

He said, “After smoking stops, ciliary function can gradually improve, helping the lungs clear mucus and trapped particles more effectively. This is one reason some people cough more during the initial period after quitting.”

Dr Kumar explained that different parts of the airway immune system recover at different speeds. Ciliary function can improve earlier, while changes in the physical properties of mucus may take considerably longer. Over time, better airway clearance can contribute to fewer respiratory symptoms and may reduce chances of respiratory infections.

Also read: It’s Not Just Tobacco: The Hidden Oral Cancer Risks We Rarely Talk About

Occasional Smoking Versus Years Of Chain Smoking

The amount and duration of smoking matter because smoking-related lung damage accumulates over time. Doctors often quantify exposure using pack-years, which takes into account both the number of cigarettes smoked and the number of years a person has smoked.

Someone who has smoked occasionally is less likely to have developed extensive structural damage. If smoking is stopped before substantial lung-function loss occurs, there is greater scope for recovery and preservation of remaining lung function.

Repeated exposure can cause chronic airway inflammation, thickening and remodelling of the airway walls, destruction of the attachments around the alveoli and progressive airflow limitation. Dr Kumar described this as a dose-response relationship rather than simply a question of how many years someone has smoked.

“The message here is by quitting smoking, there would be some changes that can be seen as a trajectory moving forward at any stage of stopping the smoking,” he said. “But what you should understand is that it does not reset the starting point in long-term smokers.”

The classic Fletcher-Peto curve is often used to illustrate this concept. Lung function naturally declines with age, but in smokers the decline can become much faster.

Dr Mehta explains, “With prolonged and heavy smoking, however, the risk of COPD, emphysema and irreversible loss of lung tissue increases. The classic Fletcher Peto curve helps explain this. Lung function, measured by FEV₁, normally declines gradually with age. In susceptible smokers, this decline can become much steeper.”

He added, “The earlier someone quits, ideally before significant loss of FEV₁ has occurred, the greater the opportunity to preserve the lung function they still have. At the same time, it is important to remember that the Fletcher Peto curve is a conceptual model and that individual rates of lung function decline can vary considerably.”

Also read: Never Smoked, Still Got Lung Cancer? Rare Gene Mutation Linked To Over 60x Risk

What Can Actually Reverse, and What Cannot?

Lung recovery can be explained by understanding functional and inflammatory changes from smoking-related destruction. According to the doctors, changes that can improve after quitting include:

• Airway inflammation
• Excess mucus production
• Poor mucus clearance
• Ciliary dysfunction
• Some amount of airflow limitation
• Cough, phlegm and breathlessness

Structural destruction of the lungs includes emphysema. In emphysema, the walls of the alveoli, the tiny air sacs where oxygen and carbon dioxide are exchanged, are destroyed. Those damaged air sacs do not simply grow back after a person quits smoking. Established fibrosis, airway remodelling and fixed airflow limitation can also become permanent.

Dr Mehta put it simply, “This is where it is important to understand the difference between inflammation and actual structural damage. Airway inflammation, excess mucus production and impaired mucus clearance can improve after quitting. Lung function may also improve to some extent,” he said. “However, when emphysema has destroyed the walls of the alveoli, those air sacs do not regenerate.”

Dr Kumar similarly pointed to the distinction between reversible airway changes and established lung parenchymal damage. “The 2026 GOLD report explicitly points out that once there is lung parenchymal damage in COPD, lung function rarely recovers fully,” he said.

The 2026 Global Initiative for Chronic Obstructive Lung Disease (GOLD) report is the current evidence-based strategy document for COPD prevention, diagnosis, and management.

Also read: 9/11: US CDC To Launch Health Study Of Exposed Children By 2027

Feeling Better Does Not Mean Lungs Have Fully Recovered

One of the more deceptive aspects of smoking-related lung disease is that symptoms and lung damage do not always move together. A person may stop smoking, notice that their cough has disappeared and find that they can climb stairs without feeling breathless. That is good news, but it does not necessarily mean that every underlying damage from smoking has reversed.

“The lungs have considerable functional reserve, so early airflow limitations or structural changes may remain unnoticed until a substantial amount of function has been affected,” Dr Singh said.

Dr Mehta similarly cautioned that symptoms are not always a reliable indicator of early lung injury. “Feeling well does not necessarily mean that the lungs are completely healthy,” he said.

This is where testing becomes important for people with a significant smoking history or relevant symptoms. Doctors use various types tests to measure how much air a person can breathe out and how quickly they can do it, helping doctors identify airflow obstruction.

Spirometry is one of the key tests. Depending on the clinical situation, doctors may also consider:

• Diffusing capacity testing (DLCO): can provide information about how efficiently gases move from the lungs into the blood.
• Chest imaging: can identify structural abnormalities that may not be apparent from symptoms alone.
• Oxygen or gas-exchange assessment: may be used when clinically indicated.
• Low-dose CT: may have a role in selected people at high risk of lung cancer and can also reveal structural abnormalities.

Dr Kumar said the practical message for people with a substantial smoking history is straightforward - “Feeling better is not the same as being cleared.”

Other Factors That Slow Down Lung Recovery

Former smokers may continue to encounter second-hand smoke, air pollution, biomass smoke, construction dust, industrial fumes and other occupational irritants. These exposures can sustain airway inflammation and aggravate respiratory conditions. Dr Kumar described recovery as something that can be affected when the airways remain under chronic irritation.

“Recovery is not a one-way door if the airway remains under chronic assault,” he said.

Dr. Singh cautions similarly, saying that these exposures can irritate the airways, worsen inflammation, and aggravate conditions like asthma or COPD. He said, “For someone whose lungs have already been affected by smoking, repeated exposure can further compromise respiratory health.”

He advised that former smokers should avoid second-hand tobacco smoke, minimise exposure during periods of severe air pollution where practical and use appropriate protective equipment when occupational exposure to dust or fumes cannot be avoided.

He added, “Persistent cough, wheezing, breathlessness, recurrent chest infections, blood in sputum or an unexplained decline in exercise capacity should not be dismissed simply because a person has stopped smoking; these symptoms warrant medical evaluation.”

Conclusion

For someone who smoked occasionally or for a shorter period and stops before significant structural damage develops, there may be substantial recovery of airway function and symptoms. For a long-term heavy smoker, quitting can still produce important benefits, including slowing further loss of lung function and improving symptoms, but it cannot always return the lungs to their original state.

“The good news is that quitting smoking benefits the lungs at any age, regardless of how long or how heavily a person has smoked,” Dr Mehta said.

The lungs may not be able to erase every scar left by years of tobacco exposure, but stopping the exposure gives them the opportunity to recover where recovery is possible and, just as importantly, protects the lung function that has not yet been lost.

“Every smoke-free day means less exposure to the lungs and a better opportunity to preserve the lung function you still have,” Dr Mehta said.