Transurethral resection of the prostate requires skin preparation of the perineal area to minimize contamination of the surgical area. Transurethral resection of the prostate is performed by inserting a urethroscope through the urethra, and then removing a portion of the enlarged prostate using an electrosurgical knife in the anterior portion of the urethroscope. The perineal region of the human body is rich in hair, and therefore tends to host a large number of bacteria, and the purpose of surgical skin preparation is to remove the hair in the perineal region, thus enabling the perineal region to be adequately disinfected and sterilized during preoperative disinfection and reducing possible infections during and after the operation. In general, urological surgery will routinely prepare the perineum for the patient, and surgery that requires the insertion of a urinary catheter for a long period of time will also require preparation of the perineum.