heartburn

n. burning sensation in the stomach or chest area caused by indigestion

This article is about the medical condition. For the film see Heartburn (film). Heartburn or pyrosis is a painful or burning sensation in the esophagus, just below the breastbone  caused by regurgitation of gastric acid. The pain often rises in the chest and may radiate to the neck, throat, or angle of the jaw. Heartburn is also identified as one of the causes of chronic cough, and may even mimic asthma.
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Heartburn is a burning sensation in the chest that can extend to the neck, throat, and face; it is worsened by bending or lying [more]Heartburn - Community and Resources

Noun
1. a painful burning sensation in the chest caused by gastroesophageal reflux (backflow from the stomach irritating the esophagus); symptomatic of an ulcer or a diaphragmatic hernia or other disorder
(synonym) pyrosis
(hypernym) symptom

(n.)
An uneasy, burning sensation in the stomach, often attended with an inclination to vomit. It is sometimes idiopathic, but is often a symptom of often complaints.