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.
Black stool may be accompanied by other symptoms, which vary depending on the underlying disease, disorder or condition. Symptoms that may accompany black stool include: Abdominal pain or cramping. Abdominal swelling or bloated feeling. Change in bowel habits. Diarrhea. Flatulence, gas or indigestion. Flu-like symptoms (fatigue, fever, sore throat, headache, cough, aches and pains). Foul-smelling stool. Nausea and vomiting. Poor appetite.