The hazards of hysteroscopy are mainly related to the technical proficiency of the operator and are generally not obvious. A few patients may cause carbon dioxide dilatation and cervical laceration. Hysteroscopy is a diagnostic and examination and treatment operation used to diagnose and treat uterine cavity diseases, such as endometrial polyps, horn pregnancy, submucosal fibroids, uterine malformations, infertility and other gynecological diseases. Some side effects may include uterine perforation, which is closely related to the condition or the position of the patient’s uterus, for example, some uteruses are excessively anterior or excessively retroflexed, and the uterus is soft during lactation, which may make the operation difficult; it may cause cervical damage, for example, some women who have had a cesarean section have a tighter cervical opening; it may cause Infection, generally postoperative routine application of antibiotics and other prevention of infection, if the inflammation is more serious it is recommended to do the examination after treatment. In conclusion, hysteroscopy is generally less harmful if done in a regular hospital, and some common hazards are mainly cervical orifice laceration, uterine perforation and infection. So do the relevant examination before the operation, pay attention to follow the doctor’s advice to take medicine to prevent infection after the operation, and prohibit sexual life for half a month or a month.