Hare lip is a folk saying, medically known as cleft lip or cleft lip and palate, which is a cleft that occurs on the upper lip due to congenital developmental defects, and some children have a combination of cleft palate. Cleft lip is a polygenic genetic disorder that may be related to genetic and environmental factors. Cleft lip is usually detected at 22 to 24 weeks of gestation during a macrosomia ultrasound. In the early stage of cleft lip, surgical repair is the mainstay, with the growth and development of the child, the nasolabial region will appear different degrees of deformity, i.e., post-surgical secondary deformity of cleft lip, which requires a series of sequential treatments for the physiological characteristics of the different periods of time, and further plastic surgery.