What Causes Acid Reflux?

Monday, November 12th, 2007

Acid reflux usually occurs when a donut shaped muscle at the bottom of the esophagus called the lower esophageal sphincter (LES) doesn’t operate properly. Normally, the LES prevents the backflow of acid by tightening up after swallowing. However, when people have acid reflux, the LES becomes relaxed and weak, which allows acid and the stomach […]