I had a total colectomy in 2001, no bag, was in the hospital for 8 days. Things were great until about 6 months ago. I am having some of the same problems again. Constipation, bloating, weight gain, and add to that diarrhea. I have an appointment to see a gastroenterologist. Could my small intestines be affected? I have not heard of small intestines being affected this way.