Ulcers

An ulcer is a sore that develops in the lining of the stomach or the duodenum, the short section of small intestine that leads away from the stomach, or on the surface of the skin as a result of infection with bacteria. An ulcer in the stomach is called a gastric ulcer; an ulcer in the duodenum is called a duodenal ulcer; and an ulcer on the skin is called a decubitus ulcer.