The deadly triad of diseases: Why cancer, heart attacks and diabetes are skewing younger

Cancer, heart attacks and diabetes are now significantly affecting the younger population, especially those in their late 20s to early 40s. Obesity, self-destructive lifestyle and delayed diagnosis are all to be blamed. Doctors tell you why what were once considered the diseases of the elderly have got the younger people under their radar.

It wasn't much long ago when heart attacks, cancer and diabetes were considered the diseases of the elderly.

But now with this triad of diseases becoming younger than ever, even mild chest pain equates to a heart attack, extreme thirst to diabetes and a mere allergic cough to something as horrific as lung cancer.

With this comes the health anxiety of developing one, or god forbid two, of these silent but soon turning-out-to-be violent diseases.

And this change, doctors say, is majorly characterised by our poor and self-destructive lifestyles. Which is exactly why, young adults (20–40 years old) are being diagnosed with cancer at an increasing and alarming rate.

"There is a notable rise in early-onset colorectal and gastrointestinal cancers among young adults," Dr Nidhi Tandon, Senior Consultant Medical Oncologist, Narayana Health City, Bengaluru, said.

In India, about 15–20% of breast cancer patients are under 40, a significantly higher statistic than in Western populations. In Bengaluru, Tandon said, hospitals report that breast cancer cases among women aged 20–40 have doubled in the past five years.

"Young adults between 20–40 years are increasingly being diagnosed, making this age group one of the fastest-growing segments in terms of new cancer cases," Dr Pallavi Redhu, Oncologist, Kailash Deepak Hospital, said.

What makes things even worse is the fact that diagnosis is often missed or delayed in younger patients preventing them from seeking timely treatment.

"Doctors often have a lower index of suspicion when evaluating a young adult, which can lead to missed early signs. That is why many younger people are increasingly diagnosed directly at Stage 3 or 4 because symptoms are often overlooked or misread," Dr Tandon added.

Most cancer screening guidelines were established when early-onset cancers were rare. Tools like mammography have lower sensitivity in women under 40. There is a need to optimise screening for younger populations, especially for those with a strong family history.

Dr Nidhi Tandon, Senior Consultant Medical Oncologist, Narayana Health City, Bengaluru

And while increased detection is contributing to the rise in cases, the fact of the matter is the rise is genuine.

"Improved awareness and access to advanced diagnostic tools have certainly contributed to earlier and more frequent detection. However, this alone does not explain the trend. A growing body of evidence suggests a genuine rise in incidence, driven by changes in dietary patterns, sedentary lifestyles, and environmental exposures," Dr Redhu explained.

And while lifestyle, diet and environmental factors do have a large role to play, even certain cosmetic procedures like keratin treatment for hair and certain chemical peels for face, that we undergo on a regular basis could be potential contributors of cancer.

"Endocrine-disrupting chemicals in cosmetics are listed as potential factors that subtly alter hormone sensitivity," Dr Tandon said.

But how does cancer is young adults differ than in the elderly? Is it typically more aggressive? The answer is complicated.

"The biology of cancer itself has not universally become more aggressive; however, certain patterns have emerged. In some cases—particularly breast cancer in younger women—tumors tend to exhibit more aggressive characteristics and atypical presentations. That said, the apparent rise may also reflect earlier onset of disease rather than a fundamental change in tumor biology across all cancers," Dr Redhu opined.

Heart attacks, too, have turned younger

What doctors call one of the most shocking trends is no longer something that we hear of rarely. From people as young as 25 succumbing to heart attacks to teenagers reporting similar incidences, the younger population has come under the radar.

"Traditionally, heart attacks were more common after 50 years of age. However, now we are seeing increasing cases in the 30–45 age group. Young adults with risk factors like diabetes, obesity, smoking, high cholesterol, and family history are especially vulnerable. In fact, even people in their late 20s are not completely risk-free anymore," Dr P R L N Prasad, Consultant, Interventional Cardiologist, Gleneagles BGS Hospitals, Kengeri, Bengaluru, said.

And Southern India is leading the charge with it becoming a hotspot of heart attacks related deaths.

"Southern India has a higher burden of metabolic disorders such as central obesity, partly due to genetic predisposition. The combination of urban residents who follow dietary patterns that include excessive refined carbohydrates through polished rice and their reduced physical activity levels creates conditions that lead to insulin resistance and cardiovascular problems," Dr Satish L, Additional Director Cardiology, Fortis Hospital Yeshwanthpur, Bengaluru, said.

Add to it rapid urbanisation, work-related stress, and reduced physical activity. Additionally, awareness and screening may still be inadequate, leading to late detection of risk factors.

Why heart attacks happen after 2 am?

And if someone has observed the pattern of heart attacks, they'll know they mostly happen between 2 am and 5 am. And

"Heart attacks during late night or early morning hours can happen due to changes in the body’s natural rhythm. During sleep, there are fluctuations in heart rate, blood pressure, and hormone levels. In some people, especially those with existing heart risk, these changes can trigger events like reduced blood flow to the heart," Dr Prasad explained.

He added that conditions like sleep apnea, stress hormones, or sudden changes in oxygen levels during sleep can increase risk at night.

"In addition, there is an early morning adrenaline surge, which can increase heart rate and blood pressure suddenly. The body is also in a relatively hypercoagulable state, meaning the blood is more likely to clot during these hours. It is not exactly that the body is “weakest” at that time, but rather that certain physiological changes during sleep can make vulnerable individuals more prone to a heart event," Dr Prasad emphasized.

What to do if someone is having a heart attack?

Doctors say recognizing symptoms early and acting quickly can be life-saving.

The first step is to identify common warning signs which include chest pain or heaviness together with tightness and breathlessness, sweating, nausea, dizziness and pain that goes to the arm and neck, jaw and back. If one or more of these symptoms are present, it's time to seek help as early as possible.

"The person should be made to sit or lie down comfortably and remain calm, and emergency medical services should be contacted immediately. If the person is conscious and not allergic, a 325mg tablet of aspirin (preferably chewed ) may be given to help reduce clot formation. It is critical to reach the nearest hospital without delay, as early intervention within the “golden hour” can significantly improve survival and outcomes," Dr Satish explained.

The golden hour is typically the first 60 minutes when a heart attack starts. With timely help, the irreversible damage to the heart can be prevented largely.

Diabetes dominates India

The last in this deadly trio is diabetes and one of the most known facts is that India is called the "Diabetes Capital of the World".

And just like heart attacks and cancer, diabetes, too, is no longer a disease of the elderly.

"We are seeing diabetes in people in their 20s, even late teens, which was rare earlier. Earlier, most patients were above 40. The concerning part is that many patients don’t even realize it early. They come late, often with complications already beginning. Young diabetes is becoming the new normal, and that’s worrying," Dr Rajiv Kovil, Head of Diabetology and weight loss expert, Zandra Healthcare and Co-founder of Rang De Neela Initiative.

What you might be missing

While the symptoms of diabetes are the same in young vs old people, the problem lies in the fact that, just like in the case of cancer and heart attacks, these are often overlooked.

"Young people may have increased thirst, frequent urination, tiredness, or weight changes. But they brush it off as stress, work pressure, or poor sleep. Sometimes, there are no clear symptoms at all, and diabetes is found on routine testing. In some cases, skin darkening around the neck (acanthosis) or frequent infections can be early signs," Dr Kovil explained.

Weight gain, especially around the abdomen, is strongly linked to insulin resistance. Even a small increase in weight can disturb metabolism. Lack of physical activity makes it worse because muscles are not using glucose effectively. Sitting for long hours, no exercise, and poor fitness all add up. You don’t have to be obese even slightly overweight with low muscle can increase risk. Movement is medicine here.

Dr Rajiv Kovil, Head of Diabetology and weight loss expert, Zandra Healthcare

To make things worse, doctors believe early onset of diabetes, particularly Type 2, is more dangerous.

"The earlier diabetes starts, the longer the body is exposed to high sugar levels. That means higher chances of complications like heart disease, kidney disease, eye problems, and nerve damage. A person diagnosed at 25 may live 30–40 years with diabetes, which increases the risk significantly," Dr Kovil said while adding that young diabetes tends to be more aggressive.

The trigger, however, here is less of genetics and more of lifestyle. Young people today move less, sit more, sleep late, and eat more processed food. There is a lot of screen time and little physical activity.

"Both matter, but lifestyle is the trigger. If you have a family history, your risk is higher but it doesn’t mean you will definitely get diabetes. What we are seeing is that lifestyle brings the disease out earlier. Someone who may have developed diabetes at 50 is now getting it at 25 because of poor habits. So genetics loads the gun, but lifestyle pulls the trigger," Dr Kovil explained while adding that the good news is that a healthy lifestyle can also delay or prevent diabetes, even if there is a strong family history.

And just like with the case of heart attacks, Southern India is a hotspot of diabetes, too. The reasons, too, are obviously the same.

"Southern India has higher diabetes rates due to a mix of genetic predisposition, urban lifestyles, and diets higher in refined carbs and rice-heavy meals. Rapid urbanization, lower physical activity, and earlier onset in younger age groups also contribute to it being a hotspot," Dr Aarti Ullal, Physician and Diabetologist, Gleneagles Hospital Parel Mumbai, said.

While younger people are bearing the brunt of their self-sabotaging lifestyles, and in some cases, genetics, there are several newer tools that makes it easy to manage the disease. However, timely detection remains the key.

"Newer tools such as diabetes CGMs, insulin pumps, and hybrid closed-loop systems are available in some metro hospitals but remain limited due to cost and access barriers," Dr Ullal said.

To better manage the rising case of diabetes in younger generations, Dr Ullal said, a lot needs to be done.

"The government can strengthen early screening for diabetes in schools and primary healthcare, especially for high-risk groups, to catch cases sooner. It can also promote healthier diets, physical activity programs, and better public awareness to reduce risk factors nationwide," Dr Ullal concluded.