Blood in stool that is not visible to the naked eye. It may be a sign of inflammation or a disease such as colorectal cancer.

A condition in which the muscle contraction in the esophagus is too strong, causing chest pain or difficulty swallowing.

Medicines that protect the stomach lining from acid. Examples are sucralfate and misoprostol. (Brand names: Carafate, Cytotec, Mylanta, Maalox)

A clear liquid made by the intestines that coats and protects tissues in the gastrointestinal tract.

Abbreviation for nonalcoholic steatohepatitis.

The feeling of needing to throw up, or vomit.

Death of cells or tissues.

A condition in which part of the tissue in the intestines is destroyed. It occurs mainly in underweight newborns.

New and abnormal growth of tissue that may or may not be cancerous. Also called a tumor.

A common, often