What Is a Stomach Ulcer?

An ulcer is an open sore in the lining of your stomach or your small intestine or even your esophagus, but when we talk about peptic ulcers, we're referring to stomach or small intestines. The most common cause of ulcers is a bacteria called H. Pylori, Helicobacter Pylori. This is a relatively recently discovered bacteria but it does seem to be the cause of over 70% of ulcers.

The second leading cause of ulcer formation are over the counter pain killers such as aspirin or Ibuprofen.