Plastic surgery for thinning alar: 1. When the alar is not too wide, the auxiliary column can be inserted into the columella. When cartilage transplantation is done on the tip of the nose, the tip of the nose will stand up and the alar will shrink, so no other operation is needed. Therefore, whether it is necessary to reduce the alar should be evaluated and judged after the nose tip standing operation. 2. alar resection is mainly suitable for orientals or blacks. It is a method to reduce the alar when the nasal base is too wide or the nostrils are too large. When the alar is wide, it is mostly because the alar skin is redundant. We need to cut off the skin under the alar and sew up the incision to narrow the alar, which will make the nostrils look very long. The incision is left at the junction of nose and cheek, and the scar is not obvious. Or 1. If the alar is wide and the nostril is wide, partial resection of alar base and nostril reduction can be performed cautiously. The incision is located at the base of alar and the lower part of alar sulcus. Under local anesthesia, part of the full-thickness tissue of the alar base was properly removed, and then the nostril was rotated inward to narrow and sutured intermittently in layers. The length of scar visible after operation is generally less than 1CM. 2. If the alar margin is wide, the alar thinning plastic surgery can be used to cut off the alar margin and sew the incision to the inner surface of the alar after trimming. 3. If the nostril is not big, the alar is too thick or the upper part of the alar groove is too plump, we can use the alar thinning plastic surgery, make a skin incision along the front edge of the lateral foot of the alar cartilage, secretly peel off the skin and the alar cartilage below, cut off the bloated soft tissue on the cartilage surface, and then appropriately remove the upper and lateral parts of the alar cartilage; Then, in the nostril, cut off a rhombic vestibular skin and nasal mucosa on the inner side of the base of the alar, and cut off excess adipose tissue. Finally, the incision on the edge of the nostril is sutured with the incision on the inner side of the base of the alar. The length of scar visible after operation is generally less than 1CM. 4. alar contraction: alar contraction is mostly congenital malformation, which is easy to cause the illusion of nasal columella drooping. The treatment for the thinning of the alar is to make an incision above the nasal vestibule or at the base of the lateral alar to separate the alar margin and separate a cavity between the external nasal skin and the vestibular skin to accommodate the implant. Cut an oval or rectangular cartilage above the lateral foot of the alar cartilage, implant the implant into the cavity separated from the upper alar, fix the transplanted mattress, pull off the thread, and fix it on the upper lip with adhesive tape.