Heartburn explained: Causes, symptoms, and when to seek care

Heartburn is something most people experience at some point. It often appears after a large meal, spicy food, or eating too close to bedtime. While occasional heartburn is usually nothing to worry about, frequent or persistent symptoms may signal an underlying digestive condition that needs medical attention.

Understanding what causes heartburn, how to recognize the symptoms, and when to seek care can help you manage it before complications develop.

Understanding heartburn

Heartburn is more than an uncomfortable burning sensation. It happens when stomach acid flows backward into the esophagus, irritating its sensitive lining. Unlike the stomach, the esophagus isn’t designed to withstand repeated exposure to acid, which is why reflux can become painful over time.

Why heartburn happens

The most common cause of heartburn is acid reflux. This occurs when the lower esophageal sphincter, the muscle that normally keeps stomach contents from moving upward, becomes weak or relaxes at the wrong time. As a result, stomach acid travels back into the esophagus and causes the familiar burning sensation.

Frequent acid reflux is known as gastroesophageal reflux disease (GERD). Without proper treatment, GERD can increase the risk of long-term damage to the esophagus.

Common heartburn triggers

Certain foods and lifestyle habits can make heartburn more likely or worsen existing symptoms. Common triggers include:

• Spicy or fried foods
• High-fat meals
• Citrus fruits and tomato-based foods
• Chocolate
• Coffee, carbonated drinks, and alcohol
• Smoking
• Certain medications, including aspirin, ibuprofen, and naproxen

Not everyone has the same triggers. Keeping track of when symptoms occur may help you identify the habits or foods that affect you most.

Symptoms to watch for

Heartburn usually causes a burning feeling behind the breastbone, often after eating or when lying down.

Other symptoms may include:

• A sour or bitter taste in the mouth
• Food or stomach acid coming back into the throat
• Bad breath
• A persistent dry cough
• Difficulty swallowing
• Tooth enamel damage caused by repeated acid exposure

If these symptoms occur regularly, they may be related to GERD rather than occasional heartburn.

When heartburn may need medical attention

Most episodes of heartburn improve with simple lifestyle changes or over-the-counter medications. However, some symptoms should not be ignored because they may indicate a more serious problem.

Heartburn or a heart attack?

Heartburn and a heart attack can both cause chest discomfort, making it difficult to tell the difference.

Heartburn usually causes a burning sensation that may be accompanied by a sour taste in the mouth or the feeling that food is coming back up. A heart attack is more likely to cause pressure, tightness, or pain that spreads to the arm, jaw, neck, shoulder, or back. It may also occur with shortness of breath, cold sweats, nausea, or sudden dizziness.

If you’re unsure whether chest pain is caused by heartburn or a heart problem, seek emergency medical care immediately.

Possible complications

Repeated acid exposure can injure the esophagus over time.

Untreated GERD may lead to complications such as esophagitis, narrowing of the esophagus that makes swallowing difficult, or Barrett’s esophagus, a condition associated with an increased risk of esophageal cancer. These complications are uncommon but become more likely when reflux remains uncontrolled for many years.

Diagnosis and treatment

If heartburn becomes frequent or persistent, your healthcare provider may recommend additional evaluation. Depending on your symptoms, this may include an upper endoscopy, imaging studies, or tests that measure acid exposure in the esophagus.

Treatment depends on the underlying cause. Mild symptoms often improve with lifestyle changes, avoiding trigger foods, remaining upright after meals, and over-the-counter antacids. More persistent symptoms may require prescription medications that reduce stomach acid. In some cases, surgery may be considered when other treatments are not effective.

FAQs about heartburn

Is occasional heartburn normal?

Yes. Many people experience heartburn from time to time, especially after large meals or certain foods.

When should I see a doctor for heartburn?

See your healthcare provider if heartburn occurs more than twice a week, doesn’t improve with treatment, or is accompanied by trouble swallowing, weight loss, or persistent vomiting.

Can heartburn damage the esophagus?

Yes. Frequent acid reflux may irritate the esophagus and increase the risk of complications if left untreated.

The bottom line

Occasional heartburn is common and often improves with simple lifestyle changes. However, frequent symptoms, difficulty swallowing, or chest pain that feels unusual should never be ignored. Understanding what causes heartburn and recognizing when it’s time to seek medical care can help protect your digestive health and prevent long-term complications.

References

National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
https://www.niddk.nih.gov/

American College of Gastroenterology (ACG)
https://gi.org/

American Gastroenterological Association (AGA)
https://gastro.org/

Mayo Clinic
https://www.mayoclinic.org/