Esophageal Reflux (GERD)
Esophageal Reflux “Sour” Stomach Is a Sign The esophagus is the passageway between the mouth and the stomach through which food passes into the gastrointestinal tract. At the base of the esophagus is the lower esophageal sphincter that keeps the stomach’s contents from moving back up into the esophagus. If this sphincter does not …