Preoperative preparation: Patients were given routine blood tests before surgery, and the results were not abnormal. After washing the axilla before surgery, the patient was placed in a flat position with both upper arms raised and abducted, and the palms of both hands were placed behind the occiput with the elbows bent, so that the axilla was fully exposed. A line is drawn along the axillary hair edge 0.5 cm outside the axillary area, which is the area of axillary subcutaneous peeling. A parallel incision, about 3-4 cm long, was made along the axillary crease, and the marked peeling area was divided into two equal parts. After shaving the axillary hair by preparing the skin in and around the operative area, the marked line is fixed with iodine. Procedure: Disinfect the axillary surgical area with iodine and spread sterile towel, use 0.5% lidocaine hydrochloride (with appropriate amount of epinephrine hydrochloride) for local skin infiltration anesthesia, the dosage is about 20-30 ml per side. after successful anesthesia, cut the skin along the design line, use anatomical scissors to sharply separate the subdermis from the subcutaneous tissue junction, with the tip of the scissors facing upward, so that the skin flap above the scissors is as thin as possible, so that the hair follicles and sweat glands remain as much as possible on the underlying tissue flap. The skin is lifted with a pulling hook and the scissors are sharply separated on the superficial fascial surface to the drawn line. After sufficient peeling, the long tissue scissors are extended from the lower end of the incision into the subcutaneous superfascial lax space and the tip of the scissors is passed through the subcutaneous tissue at the upper end of the incision. The superficial axillary fascia is picked up with a vascular clamp and pulled upward to reveal a thin layer of fibrous septum at the junction of the superficial and deep axillary fascia, which is sharply separated with small ophthalmic scissors on the deep side of the fibrous septum. During this procedure, attention is paid to hemostasis, and it is observed that the fat particles in the superficial axillary fascia are coarse and yellowish in color, while the fat particles in the deep axillary fascia are fine and white in color, which helps to grasp the level during surgery and avoid damaging the important blood vessels and nerves in the deep axillary fascia. In order to remove the axillary hair and to achieve a complete surgical result, the flap can be further held against the finger and some of the sweat glands and hair follicles remaining on the flap can be cut out. Gentamicin saline is used to flush the separated cavity, squeeze out the free tissue fragments in the peeling cavity, drain the subcutaneous fluid, stop bleeding thoroughly, and close the incision with interrupted 3-0 silk sutures. Vaseline gauze was used to cover the incision, and 4 stitches were sewn on each side of the axillary hair area, wet gauze was packed and fixed, and a compression bandage was applied with an elastic bandage “8”. Postoperatively, oral antibiotics were administered for 7 days and the shoulder was braked for at least 5 days. The compression pack was removed about 5 d after surgery, and the stitches were removed in 10-14 d.