Crohn's disease is a type of inflammatory bowel disease. It affects genetically predisposed individuals that were exposed to an environmental trigger. Some understanding speculate now the increased risk associated with western being diet and change in gut microbiota. In my thesis I give a thorough review of the conventional, common treatments of Crohn's disease and the novel treatment that are increasing in use these days. I give a detailed overview of the etiology, epidemiology, clinical symptoms, complications and diagnosis, while focusing on the treatments.