condition H. pylori (Helicobacter pylori) is a type of bacteria that infects your stomach. It can damage the tissue in your stomach and the first part of your small intestine (the duodenum). In some cases, it can also cause painful sores called peptic ulcers in your upper digestive tract. h

H. pylori (Helicobacter pylori) is a type of bacteria that infects your stomach. It can damage the tissue in your stomach and the first part of your small intestine (the duodenum). In some cases, it can also cause painful sores called peptic ulcers in your upper digestive tract.

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