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.
Anal fissures: Anal fissures are another possible cause of blood on the stool. An anal fissure is a tear in the tissue lining your anus. In addition to causing bright red blood to appear in your stool, anal fissures may also cause symptoms of anal pain and/or itching, as well as pain during bowel movements.