sentence: Ulcers can be from cancer.
sentences_before: Ulcers can be from infection with germs. Ulcers can be from pressure on a part of the skin. Ulcers can be from substances that will burn skin or mucous membranes. When acid makes some stomach ulcers this is from burning by the acid.
sentences_after: Ulcers can be from diseases of blood vessels. If not enough blood goes to a body part, it can get an ulcer. Stress can also sometimes cause ulcers. They are also noted to hurt a lot.
concept_name: ulcer
headings: Ulcer
categories: diseases Dermatology