Surgical method of repairing alar defect: 1. Repair of nasolabial groove flap: after successful anesthesia, cut off the scar of the defect, release the contracture, reset the alar and residual alar foot, cut a flap at the top of the same nasolabial groove according to the size and shape of the defect, and pull it in the flap area for suture. Pay attention to the width of the flap to avoid affecting the anatomical position of the nose and mouth. After the distal flap was folded, it was sutured separately from the edge of the wound. 2. Repair of superficial temporal vascular island flap: This method is suitable for patients with defect larger than 2.0cm× 1.0cm and scar at nasolabial groove. Explore the course of the branch of frontal artery of superficial temporal vessels before operation. During the operation, the frontal blood vessels are dissected to the skin near the hairline of the anterior frontal angle, and the blood vessels and their surrounding fascia tissues are cut off. They can pass through the edge of the alar defect along the broad subcutaneous tunnel in front of the ear, and can be lapped and sutured at the edge of the wound, or flattened and folded.