Overview

Heartburn is a burning or uncomfortable sensation felt behind the breastbone or in the upper chest and throat. It occurs when acidic stomach contents move upward into the tube that connects the mouth and stomach, the esophagus. The discomfort is a symptom of acid reflux and, when frequent or severe, may indicate gastroesophageal reflux disease (GERD). Despite its name, heartburn is not related to the heart, though its chest location can be alarming.

Causes and mechanism

Normally a ring of muscle at the lower end of the esophagus prevents stomach contents from rising. If this lower esophageal sphincter relaxes inappropriately, stomach acid and digestive juices can flow back and irritate the esophageal lining, producing the characteristic burning. Episodes may happen after meals, when lying down, or with increased abdominal pressure.

Symptoms and distinguishing features

Typical features are a burning sensation that moves upward from the upper abdomen to the chest and throat, sometimes accompanied by regurgitation of sour or bitter fluid, belching, or a sensation of a lump in the throat. Because it is felt in the chest, heartburn can mimic cardiac pain, so persistent or severe chest pain should be evaluated promptly.

Triggers, risk factors, and common causes

  • Dietary triggers: spicy, fatty, or acidic foods, chocolate, caffeine, alcohol, and large meals.
  • Lifestyle and habits: smoking, obesity, late-night eating, and certain positions after meals.
  • Medical contributors: some medications, pregnancy, and delayed stomach emptying.

Treatment and prevention

Mild heartburn often responds to lifestyle changes and over-the-counter remedies such as antacids (short-acting neutralizers). Examples include preparations based on calcium carbonate or sodium bicarbonate, which can relieve symptoms quickly. For more frequent symptoms, clinicians may recommend acid-reducing medicines (H2 blockers or proton pump inhibitors), dietary adjustments, weight loss, and avoidance of triggers.

When to see a clinician

Seek medical evaluation if heartburn is frequent, severe, interferes with daily life, or is accompanied by difficulty swallowing, unintended weight loss, vomiting, or black stools—signs that may indicate complications. A doctor can assess for GERD, esophagitis, or other causes and recommend testing or treatments tailored to the individual.

Note: For routine guidance and specific product information, consult a healthcare provider or trusted medical resources.