My Dad has been diagnosed with an anal fissure. He has diarrhea that consists mostly of blood and mucous about 30 times a day. It is very painful. He has pain across his entire abdomen before a bowel movement. He has lost 30 pounds in the last 4 weeks because he has a difficult time eating and drinking because of the abdominal pain that follows. We have a family history of ulcerative colitis but he had a colonoscopy last year (when symptoms were not present) and a biopsy and they found it was not ulcerative colitis. The doctor is saying that surgery for an anal fissure should make this better and that they cannot do a colonoscopy because of the anal fissure. In your opinion, should he have another colonoscopy and can an anal fissure alone cause this type of suffering?