GERD (chronic acid reflux)? GERD (gastro esophageal reflux disease or chronic acid reflux) is a condition in which acid-containing contents in your stomach persistently leak back up into your esophagus, the tube from your throat to your stomach. Acid reflux happens because a valve at the end of your esophagus, the lower esophageal sphincter, doesn’t … Continue reading Gastro Esophageal Reflux Disease (chronic acid reflux)