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Ulcers
An ulcer is a sore on the skin or a mucous membrane. There are several types of ulcers caused by a variety of factors. Some of the most common include ulcers that form in the lining of the stomach or intestine.

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Peptic ulcer and H. pylori

A peptic ulcer is a sore in the lining of the digestive tract. Often a source of discomfort and pain, an ulcer can even cause bleeding. A peptic ulcer can form in the stomach or the upper part of the small intestine.
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