The length of life of a patient with Crohn’s disease cannot be completely determined and can be long or short. The length of life in Crohn’s disease is strongly related to the occurrence of cancer, and if cancer occurs slowly, the patient’s life expectancy may be relatively long. In addition, the length of life of Crohn’s disease patients is also related to the presence of serious complications. If there are serious complications, such as acute perforation or acute intestinal obstruction, or a series of conditions such as bleeding or severe intra-abdominal infection, it may cause the patient’s life expectancy to be shortened.