Crohn's disease (CD) is a chronic inflammatory bowel disease which mainly affects young people. This disease evolves in successive steps and is often complicated by strictures which express characteristic signs of occlusive syndrome, more often in case of ileal than colonic involvement. The nature and localisation of strictures should be precisely defined by different techniques like endoscopy, entero-(colo)-scanner or entero-(colo)-MRI. This work-up is essential to best adapt the therapeutic care. Indeed, the fibrosing evolution of inflammatory strictures causes medical treatment's failure which may lead to endoscopic dilatation or surgical resection. To avoid this negative evolution, it is mandatory to adopt early therapeutic strategy to control inflammation.