Ulcer
An ulcer is a kind of open wound. Ulcers can be on surfaces of the body. They can be on skin. They can be mucous membranes like the surface of the stomach or inside the mouth. lolodlffkjdltluihb burn skin or mucous membranes. When acid makes some stomach ulcers this is from burning by the acid. Ulcers can be from cancer. Ulcers can be from diseases of blood vessels. If not enough blood goes to a body part, it can get an ulcer..
