Heart Burn Apr 2026

: Normally, the lower esophageal sphincter (LES) acts as a seal. If this muscle becomes loose or relaxes inappropriately, acid can leak through.

: Patients have typical symptoms but no visible esophageal damage during an endoscopy. HEART BURN

: A condition where symptoms persist despite a normal endoscopy and even when acid suppression therapy fails. It is often linked to esophageal hypersensitivity , where the nerves in the esophagus are overly sensitive to even physiological (normal) levels of acid. Distinguishing Heartburn from Heart Attacks Heartburn or heart attack: When to worry - Mayo Clinic : Normally, the lower esophageal sphincter (LES) acts

: Unlike the stomach, the esophagus lacks a protective lining against acid and pepsin. Chronic exposure damages the mucosa and submucosa, triggering pain through deep-seated sensory nerves. : A condition where symptoms persist despite a

The primary cause is gastroesophageal reflux (GER), where stomach contents regurgitate into the esophagus.

Heartburn is a painful, burning sensation in the chest or throat, typically caused by stomach acid backing up into the esophagus. This "deep" dive into the condition covers its physiological mechanisms, variations, and critical distinctions from more serious health issues. Physiological Mechanisms