Ureteral lithotripsy is one of the commonly used clinical lithotripsy procedures, the technology has been very mature, the degree of patient tolerance is better than the hard mirror, the so-called bad side refers to the possible adverse reactions that may occur during and after the operation, such as ureteral injury, postoperative infection and so on. 1. Ureteral injury: mainly when the guide wire is inserted or holmium laser used in ureteral sheath lithotripsy process may insert into the ureteral mucosa, causing submucosal injury and bleeding. 2. Postoperative infection: generally uncommon, but if the patient has a preoperative urinary tract infection, the spread of infection and retrograde upward spread of infection may be caused by surgical operation. Ureteral lithotripsy surgery is a certain risk, patients need to be treated, must go to a regular hospital, and strictly do a good job of preoperative examination and postoperative care, to minimize the adverse effects.