The first three are sensory nerves, which have a high incidence, but in the end they can only compensate or restore the sensory abnormalities in the corresponding areas. However, permanent facial nerve injury will lead to facial paralysis in the corresponding parts, with serious consequences, but the incidence is relatively low. 2. Skin necrosis Among the skin necrosis phenomena induced by laser wrinkle removal, large-area full-thickness skin necrosis is rare, but small-area and superficial necrosis sometimes occur, among which superficial skin necrosis only leaves abnormal pigment. And the incidence of skin necrosis in smokers is higher than that in non-smokers. 3. Pigmentation and other complications mainly occur in hematoma and ecchymosis caused by improper laser wrinkle removal operation. Its inducing principle is mainly due to the destruction of blood cells in the blood, causing the accumulation of hemosiderin. Once such symptoms appear, it takes 6-8 months to subside in most cases, and it takes longer for some cases to subside. ?