Gastroesophageal Reflux is a chronic disease that occurs when stomach contents flow back (reflux) into the food pipe (esophagus). It is usually caused by failure of the muscle valve (called the lower esophageal sphincter) between the stomach and the esophagus to close properly. The backwash of stomach acid irritates the lining of the lower esophagus and causes the symptom of heartburn.
Heartburn is the most common symptom of gastroesophageal reflux disease (GERD), also known as acid reflux. Heartburn occurs when acid or other stomach contents back up in the esophagus. Usually feels like a burning sensation behind the breastbone, moving up to the neck and throat.
