'''Heartburn'' ' ('''acid reflux''') is a medical condition caused by the backward flow of gastric acid from the [[stomach]] (which is lined with protective mucus) into the [[esophagus]] (which does not have the same protective lining). It The acid burns and scars the sensitive esophageal membrane, which is the source of the burning sensation. The proximate location of the stomach-esophagus connector is near the same level as the heart, which is why the common name for this condition (incorrectly) involves the heart. Chronic heartburn can be treated with lifestyle changes, [[antacids]], [[H2-receptor blockers]] or [[proton-pump inhibitor]]s; however, suffers are strongly urged to consult a physician for proper diagnosis as sometimes the symptoms of [[angina]] or [[heart attack]] can mimic those of heartburn. Also, chronic [[GERD|gastroesophageal reflux]], if untreated, may cause tissue damage (known as [[Barrett's esophagus]]), which if left untreated can be a [[precancerous]] condition. [[Category:Diseases]]
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