Gas

Gas is when air builds up in your small intestine and large intestine. Flatulence is when gas passes through the rectum and belching, or burping, is when gas passes through the mouth.

Gastroparesis

Gastroparesis or delayed gastric emptying is when the stomach has trouble clearing out its contents, possibly due to issues with the stomach muscles, nerves, or brain and spinal cord nerves.

Dyspepsia

Dyspepsia, or indigestion, may cause upper abdominal pain, burning or heat, and the stomach feeling full during or after eating.

Barrett’s esophagus

Barrett’s esophagus is when the cells lining the esophagus — the tube connecting the mouth to the stomach — change into the cells lining the intestine. The test for Barrett’s is an endoscopy.