A peptic ulcer is a sore that occurs in the stomach or small intestine lining, often due to acid. People who have ulcers may have no symptoms. Others will experience pain in the upper abdomen, feeling full or bloated, nausea or vomiting. Ulcers can bleed, either slowly or rapidly. Anemia, or lack of red blood cells, may indicate the presence of an ulcer. People with a rapidly bleeding ulcer may vomit blood or have bloody stool.

How to treat the ulcer depends on its severity and source. Bacteria can cause ulcers, in which case an antibiotic is prescribed. Acid-blocking medicines are also recommended or prescribed.