Urethral dilatation has a certain amount of pain, so before urethral dilatation, local anesthetic drugs are used in the urethra to do local anesthesia for urethral invasion to reduce the patient’s pain. Of course, it is also related to the lesion in the urethra itself. If the lesion in the urethra is more severe, such as urethral stricture, the more severe the stricture is, the more painful the dilation process is. The less severe the lesion in the urethra, the less painful the dilation will be. For an individual, the pain level during urethral dilation is greater in men than in women. Because the male urethra itself is longer and has three physiological strictures and two physiological curves, the pain during dilation is more severe than in women. In women, the urethra is relatively short and has a straighter angle, and the urethra in women is slightly wider than in men, so the pain level is relatively mild. Of course, it is also related to the operation of the operator, such as too rough action, the pain is relatively heavy, gentle action, good lubrication, the pain is also relatively mild.