I was going through a very stressful moment in my life recently and attributed the constant diarrhea to stress. However, going 15-20 times a day is not normal at all. I saw a gastroenterologist and he did a colonoscopy and from the biopsy determined I had ulcerative colitis. He started me on Sulfasalazine 500 mg 3 x a day then increased to 4 times a day. He did not want to put me on steroids (prednisone) as too many harsh side affects.