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 three main symptoms of bowel cancer are blood in the stools (faeces), a change in bowel habit (such as to more frequent, looser stools) and abdominal (tummy) pain. blood in the stools without other haemorrhoid symptoms such as soreness, discomfort, pain, itching or a lump hanging down outside the back passage. 2  abdominal pain, discomfort or bloating always provoked by eating, sometimes resulting in a reduction in the amount of food eaten and weight loss.