If taste receptors seem out of place anywhere other than the mouth, this is only because they were first found in taste buds on the tongue, says neurobiologist Thomas Finger, co-director of the University of Colorado's Rocky Mountain Taste and Smell Center in Aurora.
Symptoms may include abdominal pain, vomiting, rectal pain and diarrhea. Left untreated chronic and ongoing blood in the stool can lead to severe blood loss over time (anemia). Symptoms of anemia can include weakness, dizziness, hypotension, fainting and shortness of breath. Blood in the stool may also occur without other noticeable symptoms.
The primary symptom of this condition is the presence of blood in the vomit, which may appear as fresh blood, formed clots, or digested blood which resembles coffee grounds. Other symptoms include lack of appetite (anorexia), abdominal pain, and blackish, tar-like feces (melena).