Achalasia

Achalasia is a rare disorder in which your esophagus is unable to move food and liquids down into your stomach. Your esophagus is the muscular tube that transports food from your mouth to your stomach. At the area where your esophagus meets your stomach is a ring of muscle called the lower esophageal sphincter (LES). This muscle relaxes (opens) to allow food to enter your stomach and contracts (tightens to close) to prevent stomach content from backing up into your esophagus. If you have achalasia, the LES doesn’t relax, which prevents food from moving into your stomach.

Achalasia is a swallowing condition that affects the tube connecting the mouth and the stomach, called the esophagus. Damaged nerves make it hard for the muscles of the esophagus to squeeze food and liquid into the stomach. Food then collects in the esophagus, sometimes fermenting and washing back up into the mouth. This fermented food can taste bitter.