An ulcer is an open sore on the inside of the body or on the skin surface, that fails to heal. Overuse of over-the-counter painkillers, alcohol use.
The ulcer is a sore, indicating this is a raw, bleeding wound. Peptic ulcers, or duodenum (pronounced: doo-uh-DEE-num), are ulcers that develop in the stomach or upper part of the small intestine. Peptic ulcers are quite popular indeed.