We report on the case of a 23-year-old male, who developed diffuse gastrointestinal Crohn’s disease 2 months after gastric sleeve surgery. Prior to the surgery this patient had no previous symptoms of an inflammatory bowel disease (IBD). His only risk factor for IBD was a positive family history and he was otherwise well. As bariatric weight loss surgery becomes more widely practiced, there have been multiple sources indicating a possible causal link between bariatric surgery and new onset Crohn’s disease.