Ureteral intubation and drainage is dangerous, but the risks are small and should be minimized by actively cooperating with the doctor in all tests as well as preparations. Ureteral intubation has certain risks, such as possible ureteral injury, ureteral perforation, kidney bleeding and other risks. All surgeries have certain risks, but it is necessary for the patient and the doctor to communicate in a timely manner, to be well prepared before the surgery, and to cooperate with the doctor to actively carry out the pre-surgical examination, to control the risk within the acceptable range, which can effectively avoid the occurrence of surgical risks, and minimize the risks of the surgery. If any discomfort occurs after ureteral drainage, you should go to the hospital immediately for examination, and actively cooperate with the doctor’s treatment after finding out the situation, and carry out the corresponding treatment under the doctor’s guidance, and avoid indiscriminate use of medicines, so as not to miss the opportunity of the disease.