When the intestine is affected by a disease or disorder, one of the primary symptoms is gastrointestinal bleeding. This is often diagnosed by blood in the stools or vomit and can be fatal if not treated in a timely fashion. Gastroesophageal reflux, varices, Mallory-Weiss tear, gastritis, ulcers, hemorrhoids, anal fissures, colon polyps, ulcerative colitis, Crohn’s disease, diverticular disease, and ischemic colitis are some of the diseases that cause gastrointestinal bleeding. 

A patient who has this condition may have fatigue, anemic and have tarry stool apart from blood in vomit and stool, abdominal pain and light-headedness. 

The underlying cause of the disease has to be diagnosed to successfully treat the bleeding and ensure that it doesn’t come back.