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.
Patients should take note of 1  : straining to pass stool. 2  difficulty passing stool despite urging. 3  rectal bleeding after a bowel movement.  hard and dry 1  feces. loose or watery stool.  mucus in the 1  stool. dark or fresh blood in the stool (melena or hematochezia)  burning of 1  the anus. itching of the  anus.