Does stress cause ulcers?

Doctors used to think that ulcers were caused by stress and spicy foods. Now, we know that stress doesn’t cause ulcers- it just irritates them. Ulcers are actually caused by a bacterium (germ) called H. pylori. Researchers don’t yet know for sure how people get it. They think people might get it through food or water. It’s treated with a combination of antibiotics and other drugs.