Acid reflux happens when the contents of your stomach move back up to your esophagus and, occasionally, your mouth. This is normal and bound ... the lower esophageal sphincter (LES), relaxes ...

Learn what’s normal ... the esophagus. That’s acid reflux.1 Why does it happen? Normally, the muscle that separates your ...

It is a chronic disease where the contents of the stomach, particularly acid, reflux into the esophagus. The acid, through various mechanisms, irritates and damages the lining of the esophagus. Some ...

a; Classical achalasia, showing a dilated esophageal body bird beak-like narrowing of lower esophageal sphincter (see Video ... disorder (see Video 5). e; Normal peristaltic sequence for ...