Hi everyone, Just for everyones info I have had chronic diarrhea and intestinal pain for over a year. Finally got the nerve to go the doc. I had a colonoscopy done and he said everything looked fine visually. He did some biopsies. Well got the results back and it is collagenous colitis which is (microscopic colitis). More common in middle aged women. Only 2 in 100,000 cases. So even though visually your colon looks good hopefully your doctor does biopsies. It is treated the same exact way as ulcerative colitis. I am on Asacol for 6 month treatment.