Hemorrhage or hematoma: Hematoma is the most common complication after debridement surgery, manifested as increased pain, fullness of the affected side, swelling of eyelids and lips, and ecchymosis of the buccal mucosa, etc. It is mostly caused by incomplete intraoperative hemostasis or inaccurate postoperative bandaging. Preventive measures include complete intraoperative hemostasis under direct vision; retention of half-tube drainage or negative pressure drainage according to the intraoperative bleeding; and appropriate postoperative pressure bandaging. Once the hematoma is diagnosed, immediately remove the suture and drainage, or puncture and aspirate and apply pressure bandage. 2. Nerve injury: The motor nerve that may be injured by wrinkle removal surgery is the facial nerve, and the sensory nerve that may be injured is the greater auricular nerve, supraorbital nerve and infraorbital nerve. The common risk factors of facial nerve injury are: temporary paralysis caused by the abnormal blocking effect of local anesthetic on a certain nerve branch, which can be fully recovered after several hours; small branch dissection near the expression muscle; permanent facial nerve paralysis caused by the dissection of a certain nerve branch (stem); reversible or irreversible nerve injury can also be caused by postoperative hematoma compression or too tight bandaging. Sensory nerve injury is manifested by abnormal sensation in the corresponding area, and most of them can be compensated or recovered. Therefore, one should be familiar with the anatomical features of the facial nerve and strictly follow the anatomical level of stripping. Temporary paralysis caused by numbing drugs can recover on its own; hematoma compression caused by hematoma should be promptly removed; clear injury to the main branches of the facial nerve should be immediately intraoperative anastomosis. 3, skin necrosis: If the hematoma is not treated promptly, resulting in infection, it may lead to skin necrosis. Too thin flap peeling, which affects the blood supply, may also lead to skin necrosis. Excessive suture tension can cause necrosis of the incision edge and the formation of a visible scar. Therefore, hematoma should be actively prevented and treated promptly. Peel the flap to select the correct level with uniform thickness, and it is advisable to carry the right amount of subcutaneous fat. The suture tension is moderate. 4. Baldness: Scalp flaps that are too thin and damage the hair follicles, or damage the hair follicles when applying the electric knife can lead to baldness. Excessive scalp suture tension and incision scar formation can lead to hair follicle degeneration. Attention should be paid to the direction of the incision to reduce hair follicle damage. Peel to master the correct plane and retain a certain amount of subcutaneous fat amount. 5. Incisional scar proliferation: Incisional scar proliferation is mostly due to excessive tension of the incision or incisional infection. Therefore, the amount of skin excision should be moderate to prevent excessive tension of the incision. The incision should be closed by layered tension reduction sutures. Injury to parotid gland or parotid duct: Injury to parotid fascia during buccal dissection can cause parotid fistula. Try not to cut the parotid fascia when stripping the surface of the parotid fascia; pay attention to prevent damage to the parotid duct when stripping under the subcutaneous and SMAS of the cheek. 7. Bilateral asymmetry: The following factors can lead to bilateral asymmetry after surgery: bilateral asymmetry in incision design; bilateral asymmetry in the level and extent of flap peeling; bilateral differences in the amount of skin tissue removed; and bilateral inconsistency in the degree of flap lifting during suturing. Therefore, care should be taken to avoid this in each of these aspects.