Indications of nostril plastic surgery: the nostril is flat and its shape is close to the horizontal oblate circle, which is not good; Congenital or acquired deformities, such as trauma deformity, nostril atresia, absence, bilateral nostril size difference, etc. Nasal plastic surgery involves cartilage, which is difficult. Simple rhinoplasty can't solve the problem of nostril, which needs to be considered comprehensively according to the phenomenon of total nose. According to the specific phenomenon of nose and nostril, choose the surgical coup.