Ulcerative colitis and obesity share a systemic chronic inflammatory response manifested by increased inflammatory markers. There are data suggesting a benefit in both diseases after inflammatory markers are decreased. We present a 39-year-old morbidly obese male with a history of ulcerative colitis who manifested significant symptomatic improvement after an 86.8% excess weight loss following gastric bypass surgery. We believe that this result may have been due to a reduction of inflammatory markers secondary to considerable weight loss. Although to our knowledge there are no publications showing a direct relationship between symptomatic improvement of ulcerative colitis and weight loss in the obese patient, we believe that weight loss surgery could become a promising tool in the treatment of ulcerative colitis when associated with morbid obesity.