Heartburn: what it usually means
Also searched as: acid reflux, burning in chest after eating, indigestion · Updated 19 Aug 2026 · Educational — not medical advice
The short answer: Heartburn, a burning sensation behind the breastbone, usually happens when stomach acid flows back up into the esophagus after eating. It's very common, especially after large or spicy meals, and often eases with simple changes like smaller meals or avoiding lying down right after eating. Frequent or severe heartburn, or heartburn with difficulty swallowing or unintentional weight loss, should be evaluated by a doctor.
See a doctor promptly if…
Heartburn occurring more than twice a week despite lifestyle changes should be evaluated.
Difficulty or pain when swallowing needs prompt medical attention.
Heartburn with unintentional weight loss or persistent vomiting warrants a doctor's review.
Chest pain that could be heartburn but also has breathlessness or spreads to the arm needs emergency evaluation.
Heartburn that wakes you at night regularly deserves medical discussion.
Common causes
- Large or fatty meals — Eating large portions or fatty, spicy foods relaxes the valve between the stomach and esophagus, allowing acid to rise.
- Lying down after eating — Reclining soon after a meal makes it easier for stomach acid to travel upward.
- Excess body weight — Extra abdominal weight increases pressure on the stomach, pushing acid upward.
- Certain medications — Some medications can relax the esophageal valve or irritate the stomach lining.
- Pregnancy — Hormonal changes and increased abdominal pressure during pregnancy commonly cause heartburn.
What helps
- Eat smaller, more frequent meals instead of large ones.
- Avoid lying down for two to three hours after eating.
- Limit trigger foods like spicy, fatty, or acidic items, and reduce caffeine and alcohol.
- Elevate the head of your bed if nighttime heartburn is frequent.
Which doctor to consult
Start with your family doctor; heartburn occurring more than twice a week despite lifestyle changes may be referred to a gastroenterologist.
Questions people ask
How can I tell heartburn apart from a heart problem?
Heartburn typically causes a burning feeling tied to eating or lying down, without breathlessness or sweating. Because heart-related pain can sometimes mimic heartburn, any new or severe chest discomfort, especially with breathlessness or arm pain, should be treated as an emergency until checked.
Why do I get heartburn at night?
Lying flat makes it easier for stomach acid to move up into the esophagus, especially after a late or large meal. Eating earlier, avoiding trigger foods, and raising the head of your bed can often help reduce nighttime heartburn.
Related symptoms
This guide is educational and doesn't replace a clinical assessment. If a symptom is severe, rapidly worsening, or worrying you, see a doctor — being checked and reassured is never a wasted visit.