The difference comes down to what triggers the pain and how it feels

Heartburn and heart attack chest pain can feel similar enough that you might not know which one you have. The safest rule: if you are unsure, treat it as a heart attack and call 911. But there are real differences in how each one starts, what makes it worse or better, and what other symptoms come with it.

Heartburn is acid reflux—stomach acid backing up into your esophagus. It burns behind your breastbone and often feels like pressure or tightness. A heart attack happens when blood flow to your heart muscle is blocked. The pain can also feel like pressure, but it usually comes with other warning signs: shortness of breath, sweating, nausea, pain in your arm or jaw, or a feeling that something is seriously wrong.

The key difference is that heartburn usually has a clear trigger (a large meal, lying down, spicy food) and gets better with antacids or sitting upright. Heart attack pain does not respond to antacids and often gets worse or stays the same, sometimes spreading to your shoulder, neck, or left arm.

Key Takeaways

  • Heartburn is triggered by food or position and improves with antacids or sitting up; heart attack pain comes on without a clear trigger and does not improve with antacids.
  • Heart attack warning signs include shortness of breath, sweating, nausea, pain radiating to your arm or jaw, and a sense of dread or that something is very wrong.
  • If you are unsure whether chest pain is heartburn or a heart attack, call 911—the cost and inconvenience of a false alarm is far smaller than the risk of waiting.
  • Women may experience heart attack symptoms differently than men, including fatigue, indigestion, or pain in the upper back rather than classic chest pressure.
  • Risk factors like age, smoking, high blood pressure, diabetes, or a family history of heart disease make a heart attack more likely if you have chest pain.

Heartburn symptoms and what triggers them

Heartburn usually starts 30 minutes to 2 hours after eating, especially after a large meal, fatty foods, chocolate, caffeine, or alcohol. The pain is a burning sensation behind your breastbone that may feel like pressure or tightness. It often improves when you sit upright, take an antacid like calcium carbonate or omeprazole, or drink water.

Other signs that point to heartburn: the pain stays in one place (usually your chest or upper abdomen), you have a sour taste in your mouth or feel like food is stuck in your throat, and you may burp or feel bloated. These symptoms usually last a few minutes to a few hours and then go away on their own or after treatment.

Heartburn is common and usually not dangerous on its own, though frequent heartburn can damage your esophagus over time. If you have heartburn more than twice a week, talk to your doctor about long-term management.

Heart attack symptoms and warning signs

A heart attack often starts suddenly, without a clear trigger. The most common symptom is chest pain or pressure that may feel like someone is squeezing your chest, but it can also feel like heaviness, tightness, or aching. The pain may stay in one spot or spread to your left arm, shoulder, neck, jaw, or back.

Other warning signs that often come with heart attack chest pain include shortness of breath (with or without chest pain), sweating that feels cold or clammy, nausea or vomiting, lightheadedness or dizziness, and a sense of extreme anxiety or that something is very wrong. Some people describe it as a feeling of impending doom.

Heart attack symptoms can last from a few minutes to several hours. They do not improve with antacids, rest, or changing position. If the pain comes and goes, that does not mean it is safe—some heart attacks cause intermittent pain. Any chest pain that concerns you warrants a call to 911.

How risk factors change what chest pain might mean

Your age, medical history, and lifestyle affect how likely a heart attack is if you have chest pain. People over 45 (men) or 55 (women) have higher risk. So do people who smoke, have high blood pressure, high cholesterol, diabetes, or a family history of heart disease or early heart attacks.

If you have one or more of these risk factors and develop chest pain, the chance that it is a heart attack is higher than for someone without those factors. That does not mean you definitely have a heart attack, but it means you should not wait to find out. Call 911 and let paramedics and hospital staff assess you.

Even if you have no known risk factors, chest pain can still be a heart attack. Young people and women are sometimes missed because they or their doctors assume the pain is something else. Do not let your age or lack of risk factors make you ignore chest pain.

Why women's heart attack symptoms are often different

Women are more likely than men to have heart attacks without classic chest pressure. Instead, women may feel shortness of breath, fatigue, nausea, indigestion, or pain in the upper back, neck, or jaw. Some women describe a sensation of heaviness or tightness rather than sharp pain.

Because these symptoms can feel like heartburn, the flu, or stress, women sometimes delay calling for help. If you are a woman and you have unusual fatigue, shortness of breath, or indigestion that does not respond to antacids and feels different from your normal heartburn, do not assume it is heartburn. Call 911 if the symptoms worry you.

Women also have higher rates of heart disease after menopause, when estrogen levels drop. If you are a postmenopausal woman with new chest symptoms, take them seriously even if they seem mild.

What to do if you think you are having a heart attack

Call 911 immediately. Do not drive yourself to the hospital. Do not wait to see if the pain goes away. Paramedics can start treatment in the ambulance, and hospitals need to know you are coming so they can prepare. Every minute matters when blood flow to your heart is blocked.

While waiting for the ambulance, sit or lie down and try to stay calm. If you have been prescribed nitroglycerin (a medication for chest pain), take it as directed. Chew an aspirin if you have one and are not allergic—aspirin can help prevent blood clots. Do not take antacids hoping the pain will go away; if it is a heart attack, antacids will not help and delay will hurt.

Tell the paramedics and hospital staff about all your symptoms, when the pain started, what you were doing when it began, and any medications you take. If you have a family member or friend nearby, have them go with you or meet you at the hospital.

When to call 911 versus going to urgent care

Call 911 for any chest pain that comes with shortness of breath, sweating, nausea, pain in your arm or jaw, or a feeling that something is very wrong. Call 911 if the pain is new and severe, or if it lasts more than a few minutes. Call 911 if you have risk factors for heart disease and develop chest pain, even if it seems mild.

Do not go to urgent care for chest pain. Urgent care clinics are not equipped to handle heart attacks, and you will lose time. The emergency department at a hospital can do an EKG (a test that records your heart's electrical activity), blood tests, and imaging to rule out a heart attack quickly.

If you have chronic heartburn and the pain feels exactly like your usual heartburn, you may try an antacid at home. But if the pain is different, worse, or does not improve in 15 minutes, call 911. It is better to be wrong than to miss a heart attack.

What happens at the hospital when you arrive with chest pain

The emergency department will do an EKG (electrocardiogram) within minutes—this records the electrical signals of your heart and can show if you are having a heart attack. You will have blood tests to check for troponin, an enzyme that rises when heart muscle is damaged. You may have a chest X-ray or CT scan to look for other causes of your pain.

Doctors will ask about your symptoms, when they started, what makes them better or worse, and your medical history. Be honest about all your symptoms, even ones that seem unrelated. Tell them if you smoke, use cocaine or other stimulants, or have a family history of heart disease.

If the EKG and blood tests show no heart attack, doctors will still watch you and may repeat tests after a few hours. Some heart attacks do not show up on the first EKG. You may be sent home with instructions to follow up with your doctor, or you may be admitted for observation. Do not leave the hospital without being cleared by a doctor.

Frequently Asked Questions

Can heartburn feel exactly like a heart attack?

Yes, heartburn can cause chest pressure that feels similar to a heart attack. The difference is that heartburn usually has a clear trigger (food, position), improves with antacids or sitting up, and does not come with shortness of breath or sweating. If you are unsure, call 911—paramedics and hospital staff are trained to tell the difference.

Is it safe to take antacids to see if chest pain is heartburn?

No. If you have chest pain and you are unsure what it is, call 911 instead of trying antacids. Waiting to see if antacids work delays treatment if it is a heart attack, and that delay can cause permanent damage to your heart or death. Antacids are safe, but they are not a diagnostic test.

What if I have chest pain but no other heart attack symptoms?

Chest pain alone can be a heart attack, especially if it is new, severe, or lasts more than a few minutes. Some people have heart attacks without shortness of breath or sweating. If you have chest pain that worries you, call 911. Do not assume it is safe just because you feel okay otherwise.

Can anxiety cause chest pain that feels like a heart attack?

Yes, anxiety and panic attacks can cause chest tightness, shortness of breath, and sweating. But you cannot tell the difference between anxiety and a heart attack on your own. Call 911 and let doctors rule out a heart attack. Once they confirm your heart is fine, they can help you manage anxiety.

If I have had heartburn before, is new chest pain definitely heartburn?

No. Having a history of heartburn does not mean all chest pain is heartburn. Heart attacks can happen to people who have had heartburn many times. If new chest pain feels different from your usual heartburn, or if it does not respond to your usual treatment, call 911.