25 Reasons Why Your Stomach Hurts

11. Stomach Ulcers

Stomach ulcers are lesions in the stomach or small intestinal lining. They occur when the stomach’s protecting mucus loses its effectiveness. The stomach secretes a powerful acid that aids digestion and protects against germs. The stomach secretes a thick layer of mucus to protect the body’s tissues from the acid. If the mucus layer wears away and stops functioning properly, the acid can damage stomach tissue and cause ulcers. An estimated 1 in 10 people in Western countries may develop a stomach or small intestine ulcer at some point in their lives. Stomach ulcers are relatively simple to treat, but if left untreated, they can cause serious complications.