Acid reflux disease occurs when the sphincter muscle at the base of the esophagus does not close like it should. The result is the contents of the stomach and the acids in it go back up to the esophagus. Acid reflux usually feels like a burning pain in the chest that can move up to the throat. It often feels as if food is coming back into the mouth and leaving an acidic taste.

When the mixture of stomach acid and enzymes are refluxed into the oesophagus more frequently than they should, or
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