The upper lip of a normal person is too short to be corrected, and the skin cannot be prolonged without cutting the skin. Oral incision can improve the corners of the mouth, but it can't prolong the upper lip. The upper lip is too short: surgery can be used to increase the height of the upper lip, mainly including intraoral method and extraoral method: intraoral method: make an incision in the vestibular sulcus of the maxilla, find out the quadratus muscle of the upper lip on both sides, cut off this muscle, and appropriately extend the mucosal tissue of the frenum to relax the upper lip; This method can't increase the height of the upper lip in a short time, and it can only be effective if the patient exercises the lip function for a long time. Extraoral method: the height of upper lip was increased by bilateral alar triangle flap. This method has obvious effect and can immediately increase the height of the long lip, but there may be scars on the bottom of the upper lip and alar.