Heart Attack or Acidity? Know the Difference Before It’s Too Late

August 1, 2026

A burning sensation in the chest after a heavy meal is often blamed on acidity or acid reflux. While this is true in many cases, not all chest discomfort is related to indigestion. Sometimes, what feels like acidity may actually be the first sign of a heart attack.

Every year, many people delay seeking medical attention because they assume their symptoms are “just gas” or “acidity”. This delay can prove dangerous, as early treatment is crucial during a heart attack. Although the symptoms can sometimes overlap, there are important differences that everyone should know.

Why can a heart attack feel like acidity?

The heart and the food pipe (oesophagus) are located close to each other in the chest and share some nerve pathways. As a result, the brain may find it difficult to distinguish between pain originating from the heart and pain caused by acid reflux. Relying solely on the nature of the pain can therefore be misleading. This is why a heart attack can sometimes present as:

A burning sensation in the chest
Upper abdominal discomfort
Indigestion
Nausea
A feeling of fullness after eating

What does acidity usually feel like?

Acidity, also known as acid reflux or gastro-oesophageal reflux, occurs when stomach acid flows back into the oesophagus. Although uncomfortable, acidity is generally not life-threatening.

Typical symptoms include:

Burning sensation behind the breastbone
Sour or bitter taste in the mouth
Burping or belching
Symptoms that begin after eating a heavy or spicy meal
Discomfort that worsens on lying down or bending forward
Relief after taking antacids

What does a heart attack feel like?

A heart attack occurs when blood flow to part of the heart muscle is suddenly blocked. While the symptoms can vary from person to person, the discomfort may last for several minutes, come and go, or steadily worsen. Also, it is important to know that not every heart attack causes severe chest pain. Common symptoms include:

Pressure, heaviness or tightness in the centre of the chest
Pain that may spread to the left arm, both arms, shoulders, neck, jaw or upper back
Shortness of breath
Cold sweating
Nausea or vomiting
Dizziness or fainting
Unexplained weakness or fatigue

Heart Attack vs Acidity: Key Differences

Feature	Acidity	Heart Attack
Type of discomfort	Burning sensation	Pressure, squeezing, heaviness, or tightness in the chest
Typical trigger	Often occurs after eating, spicy foods, or lying down	May occur during physical activity, emotional stress, or even at rest
Relief	Often improves with antacids or acid-suppressing medication	Usually does not improve with antacids; requires urgent medical attention
Pain radiation	Usually remains confined to the chest or upper abdomen	May spread to the left or both arms, jaw, neck, shoulders, or back
Associated symptoms	Burping, bloating, sour taste in the mouth	Sweating, shortness of breath, nausea, vomiting, dizziness, or fainting
Duration	Variable; often settles within minutes to hours	Typically lasts more than 10–15 minutes, may recur, or progressively worsen

Please keep in mind that these differences are not absolute since some heart attacks may present atypically, especially in women, older adults and people with diabetes.

Heart attack symptoms may be different in women

Women are more likely to experience less obvious symptoms, and because these symptoms are subtle, they are often mistaken for acidity, stress or exhaustion.
Common symptoms could be:

Unusual fatigue
Breathlessness
Nausea or indigestion
Pain in the upper back, neck or jaw
Light-headedness
Mild chest discomfort instead of severe pain

People with Diabetes may have silent heart attacks

Individuals with diabetes may experience minimal or no chest pain because nerve damage can reduce pain sensation, which makes regular health check-ups and prompt evaluation of unusual symptoms particularly important.

Instead of the obvious symptoms, they may notice:

Sudden sweating
Breathlessness
Extreme fatigue
Nausea
Dizziness
Unexplained weakness

Who is at higher risk of a heart attack?

Your risk is higher if you have:

High blood pressure
High cholesterol
Diabetes
Obesity
A history of smoking or tobacco use
A sedentary lifestyle
Chronic stress
A family history of early heart disease
Increasing age

If you have one or more of these risk factors, never dismiss persistent chest discomfort as simple acidity without medical evaluation.

What should you do if you’re unsure?

Doctors can quickly determine the cause using an electrocardiogram (ECG), blood tests for cardiac markers and other investigations. If chest discomfort is new, severe, persistent or accompanied by sweating, breathlessness, dizziness or pain spreading to the arm or jaw, you should treat it as a medical emergency.

With any of these symptoms, it’s better to call emergency medical services or go to the nearest hospital immediately. It is crucial you do not attempt to drive yourself, if symptoms are severe, and do not wait to see whether antacids provide relief.

When it comes to a possible heart attack, every minute counts.

Can heart attacks be prevented?

Early detection of cardiovascular risk factors can significantly reduce the likelihood of future heart disease. Many heart attacks can be prevented by controlling risk factors. Some simple steps include:

Eating a heart-healthy diet
Exercising regularly
Maintaining a healthy weight
Controlling blood pressure, cholesterol and diabetes
Quitting smoking
Limiting alcohol intake
Managing stress
Undergoing regular preventive health check-ups

Don’t ignore chest discomfort

Whether it’s acidity or a heart problem, persistent chest discomfort deserves attention. It is far safer to have a harmless episode of acidity evaluated than to ignore the early signs of a heart attack. If symptoms are unusual, severe or accompanied by other warning signs, seek immediate medical care instead of trying home remedies.
Listening to your body and acting promptly could save your life.

Expert Opinion

"Many people mistake the early signs of a heart attack for acidity or indigestion, delaying life-saving treatment. While acidity usually causes a burning sensation after meals and may improve with antacids, a heart attack often presents as pressure, heaviness, or pain in the chest that may spread to the arm, jaw, back, or shoulder. It can also be accompanied by shortness of breath, cold sweats, nausea, or unexplained fatigue. If you experience persistent chest discomfort or any of these warning signs, seek emergency medical care immediately rather than assuming it is just acidity."

-Consultant Interventional Cardiologist
-Desun Hospital, Kolkata

Why choose Desun Hospital?

Desun Hospital offers comprehensive cardiac care with experienced cardiologists, a dedicated emergency team, advanced ECG and cardiac biomarker testing, state-of-the-art cardiac catheterisation laboratories and round-the-clock emergency services. From rapid diagnosis to advanced interventional cardiology and cardiac surgery, patients receive timely, evidence-based care when every second matters.

Frequently Asked Questions (FAQs)

Can acidity feel exactly like a heart attack? Yes. Both conditions can cause chest discomfort or a burning sensation, making it difficult to distinguish between them without medical evaluation.

If the pain improves after taking an antacid, can I rule out a heart attack? No. Relief with an antacid does not completely exclude a heart-related problem. Persistent or recurrent chest pain should always be assessed by a doctor.

Can a heart attack happen without severe chest pain? Yes. Some people, especially women, older adults and those with diabetes, may have mild or atypical symptoms.

How long should chest pain last before I seek help? Any new chest pain lasting more than a few minutes, recurring, or accompanied by sweating, breathlessness or pain radiating to the arm or jaw should be treated as an emergency.

What tests are done to diagnose a heart attack? Doctors commonly use an ECG, blood tests for cardiac enzymes (such as troponin), echocardiography and, if needed, coronary angiography to confirm the diagnosis.