Intestinal lymphoma is a form of cancer that begins in the lymph tissue within the intestines. It can cause nausea, abdominal pain, weight loss, and bloody stools. Surgery may be required. The ...

Gas, indigestion, and stomach viruses are common causes of upper stomach pain. In more severe cases, it can indicate appendicitis, bowel obstruction, or peptic ulcers. Not all pain feels and acts the ...