2. The lateral incision is spindle-shaped, starting from the pubic mound 1cm above the clitoris root, going down along the lateral side of the left and right labia majora (at a distance of 1 ~ 2 cm from the outer edge of the lesion) and reaching the back of perineum. The internal incision is also spindle-shaped, starting from below the clitoris frenum, ending at the urethral orifice, down the inner side of the left and right labia minora and the outer edge of the vestibule, and meeting at the posterior commissure of the labia. Before the operation, the incision line () can be marked with the tip of a knife or gentian violet.

3. Cut the skin and subcutaneous fat. Cut the whole skin layer along the external incision (), and cut the skin and subcutaneous fat in front of the pubic bone downward from the pubic mound. The depth does not need to reach the fascia layer. When the pubic arch is cut, it is above the urethral orifice (). Care should be taken to avoid damaging the urethra. If necessary, a metal catheter can be inserted into the urethra to indicate the position. The clitoris back, veins and clitoris feet exposed during excision should be clamped, cut off and ligated (). Incise subcutaneous adipose tissue obliquely from the outside to the inside of labia majora, and stop at the vaginal wall, and the depth does not have to reach the perineal myofascia (). Pay attention to the ligation of internal pudendal artery and vein ().

4. Vulvar resection will remove the separated vulvar tissue along the medial incision ().

5. Stitch the subcutaneous fat layer intermittently between the medial and lateral cutting edges to eliminate the dead zone (). Then suture the skin intermittently, and sew the mucosa of urethral orifice and vaginal orifice with the surrounding skin respectively, so that the wound is racket-shaped (). Postoperative indwelling catheter.