Crohn’s disease is a chronic disease of unknown etiology. Together with ulcerative colitis and intermediate colitis, it forms the classification group of inflammatory bowel diseases. It is most prevalent in industrialized countries. Although by definition incurable, the disease is usually treated conservatively and surgically. The onsets and progression are influenced by genetic and environmental components; nevertheless, this has yet to be fully clarified. To make it easier to quantify pathomorphology and disease activity, the Montreal classification and the Crohn’s Disease Activity Index are widely used. We used a case report to illustrate the disease’s natural course and its treatment from diagnosis through to the end of our follow-up.