Asymmetry of labial size usually refers to an asymmetric deformity that is visible to the naked eye. The causes include congenital developmental factors, trauma and scar pulling due to lateral vulvar incision, etc. The treatment methods are as follows: 1. Subtractive treatment on the hypertrophic side or additive treatment on the thin side through surgery to improve the symmetry of the vulva; 2. If the cause of vulvar asymmetry is scar pulling, the treatment of scar release and tissue reset is needed first, along with flap transfer to improve the asymmetric shape.