Horizontal, the vertical spindle-shaped excision law is in an upper lip both sides various seams needle, tows two to cause the upper lip eversion.

• 重唇主要见于上唇，多在青春期表现最为明显，质地均与正常无异，少数病人可能有家族史。该畸形对容貌影响很大，在闭口时，畸形不显，开口时，可见两唇缘。