The common items of "light medical beauty" include injection of water light needle, hyaluronic acid filling, laser dot matrix, etc., which are safe and controllable, and have a short recovery period. However, there may occur the skin inflammatory infection, allergy, local tissue swelling, pigmentation and other side effects after treatment, which affect the efficacy. It is of great significance to study the mechanism of side effects and repair strategies. In this paper, the current widely used “light medical beauty” items are classified, and their potential side effects are concerned. The side effects and skin damage mechanisms of two representative “light medical beauty” items of non-open wound and open wound are described, and the corresponding repair strategies are summarized in order to provide some reference for clinical practice.