What is a peptic ulcer?

A peptic ulcer is a sore in the lining of your stomach or duodenum.* The duodenum is the first part of your small intestine. If peptic ulcers are found in the stomach, they're called gastric ulcers. If they're found in the duodenum, they're called duodenal ulcers. You can have more than one ulcer.

*Linked terms are defined in the glossary.

Many people have peptic ulcers. Peptic ulcers can be treated successfully. Seeing your doctor is the first step.