Acid reflux and gastroesophageal reflux disease (GERD) are closely related, but the terms aren't necessarily interchangeable. Acid reflux is the backward flow of stomach acid into the esophagus — the tube that connects the throat and stomach. Acid reflux is more specifically known as gastroesophageal reflux. During an episode of acid reflux, you may taste regurgitated food or sour liquid at the back of your mouth or feel a burning sensation in your chest (heartburn). Sometimes acid reflux progresses to GERD, a more severe form of reflux. . read more.
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