A to Z: Duodenitis

May also be called: Gastritis; Acute Gastritis; Chronic Gastritis

Duodenitis is irritation and inflammation of the lining of the duodenum (the upper part of the small intestine).

More to Know

Food exits the stomach through the duodenum, a tube about a foot long that leads to the rest of the small intestine.

Conditions that can cause irritation to the walls of the stomach or duodenum include overuse of some medications, alcohol, smoking, some diseases and conditions, abdominal injuries, and some bacterial and viral infections. Duodenitis can lead to peptic ulcers and cause abdominal pain, nausea, and vomiting.

Keep in Mind

Some causes of duodenitis disappear over time. Most cases of duodenitis can be treated effectively with medications or lifestyle and diet changes.

All A to Z dictionary entries are regularly reviewed by KidsHealth medical experts.