Gastrointestinal reflux refers to the chronic digestive condition commonly called acid reflux . The lower esophageal sphincter functions as a valve. This muscle located in the esophagus remains closed most of the time. It opens to allow food and fluids to pass to the stomach. In the presence of acid reflux, the lower esophageal sphincter does not close completely or may open spontaneously for varying lengths of time. Food and acid from the stomach flows back into the esophagus. Acid blockers, which include H2 blockers and proton pump inhibitors, are a group of medications used to treat acid reflux. Causes of Acid Reflux Medical experts acknowledge a malfunctioning lower esophageal sphincter as the mechanism for acid reflux but the exact cause for this problem remains unclear. According to the Medical News Today website, certain conditions, foods and habits contribute to the incidence of acid reflux. Women can experience acid reflux during pregnancy and especially during the t
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