What Is Gastroesophageal Reflux Disease (GERD)
Overview Gastroesophageal reflux disease (GERD)is the abnormal backflow of stomach acid up into the esophagus, the long, muscular tube that connects the back of the mouth to the stomach. The muscle at the border of the esophagus and stomach, called a sphincter, works as a barrier that is normally closed to prevent the contents of the […]