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Acid Reflux Disease Symptoms, Causes, Tests, and Treatments
WebMD provides an overview of acid reflux disease, including symptoms, causes, diagnosis, treatments, and helpful diet and lifestyle tips.

At the entrance to your stomach is a valve, which is a ring of muscle called the lower esophageal sphincter (LES). Normally, the LES closes as soon as food passes through it. If the LES doesn't close all the way or if it opens too often, acid produced by your stomach can move up into your esophagus. This can cause symptoms such as a burning chest pain called heartburn. If acid reflux symptomshappen more than twice a week, you have acid reflux disease, also known as gastroesophageal reflux disease (GERD).
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