Nasal flap is an arch-shaped structure composed of skin, subcutaneous fibrous tissue, nasal cartilage nasal vestibule squamous epithelial layer, for the upper and outer edges of the nostrils, the most common nasal flap flare is symmetrical hypertrophy of the nasal flap of familial or racial characteristics. The most common form of nasal flaring is symmetrical hypertrophy of the family or racial characteristics. Nasal flaring requires nasal reduction, i.e., surgical excision or thinning of the nasal flap, which is a three-dimensional beauty of the nose, and can also be called nasal restoration type of surgery. Nasal flaring can be corrected by nasal excision, which can be divided into the following types according to the specific operation: 1, nasal dyke excision; 2, nasal wedge excision, which is applicable to the flaring of the nasal leaflets, nasal flange, but the nasal base is normal, nostril normal size; 3, nasal dyke, nasal joint excision, which is applicable to the flaring of the nasal leaflets, nasal flange, nasal flange, while the base of the nostrils is wide, nostril is large, and the nostrils can be narrowed at the same time. Nasal base width and reduce the nasal angle, correcting nasal lobule expansion; 4, nasal base crescent-shaped incision to thin the nose, can be simultaneously and nasal dike excision nasal excision or nasal dike, nasal joint excision at the same time.