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Center For Digestive Disorders
What is Heartburn?
Heartburn is a burning sensation behind the breastbone which results from the reflux (back flow) of
acid and other stomach contents from the stomach into the esophagus (swallowing tube). Normally, acid
should remain in the stomach when a meal is eaten. Heartburn arises when the "valve" (called the lower esophageal sphincter)
between the esophagus and the stomach relaxes abnormally.
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