The hazards of Crohn’s disease are as follows: 1, the current medical treatment can not be cured, once diagnosed will be accompanied by the patient’s whole life; 2, if the medication can be maintained, generally does not affect the patient’s normal life; 3, if the treatment is not appropriate or found late, it will bring certain harm, such as enteritis caused by Crohn’s disease, with the development of the disease eventually lead to abdominal abscess, intestinal obstruction, intestinal perforation, etc., if it is difficult to improve the condition through the medication, it is also necessary to accept a number of laparoscopic surgery, which will seriously affect the patient’s quality of life, or even affect the life expectancy; 4, about half of the patients will be anal fistula, perianal abscesses and other complications.