Plastic surgery is a broad field that includes not only cosmetic or aesthetic surgery, but also surgical repair of congenital deformities such as cleft lip and palate, post-surgical reconstruction such as breast and head-and-neck defects, and correction of post-traumatic defects. The main aim of plastic surgery is to restore the function and appearance of tissue and skin so it’s as close to normal as possible. Plastic surgery procedures that are medically necessary improve the health or function of a person’s body. Many of these procedures are also cosmetic as a secondary function.