An open sore on an external or internal surface of the body, caused by a break in the skin or mucous membrane which fails to heal. Ulcers range from small, painful sores in the mouth to bedsores and serious lesions of the stomach or intestine.
dull pain in the stomach.
not wanting to eat because of pain.
nausea or vomiting.
burping or acid reflux.
heartburn (burning sensation in the chest)