Heartburn
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Heartburn is a medical condition caused by the 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 can be treated with lifestyle changes, antacids, H2-receptor blockers or proton-pump inhibitors; 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 gastroesophageal reflux, if untreated, may cause tissue damage (known as Barrett's esophagus), which if left untreated can be a precancerous condition.