Defect above the alar: first remove the scar, remove all contracture scars, cut and relax the lower skin, and then pull it down to make it symmetrical with the opposite side. Then the skin graft was pressurized, and the full-thickness skin graft was taken, transplanted to the wound, carefully sutured, bandaged and fixed under pressure. It takes about two weeks to open the package and take out the stitches. Alar marginal defect: This alar defect is usually full-thickness, including alar cartilage. Spiral tissue is the most ideal material for implant, which can be completed at one time, and its quality, thickness, elasticity and color are similar. If the width of the graft is less than 1.5cm, the deformation of the ear shell is not obvious. After the transplanted tissue survives, there is generally no contraction. Postoperative management of alar defect, appropriate pressure dressing after operation, gauze packing for patients with internal nostril incision. Oral antibiotics to prevent infection. Take out stitches in a week or so. There are few complications, and the scar of skin incision is very small, which is gradually not obvious with the passage of time. Precautions before operation for alar defect: Patients should choose suitable silicone prosthesis according to their own requirements under the guidance of doctors, and take skull X-rays if necessary. Check your health. Women avoid menstruation.