E light skin rejuvenation technology combines two technologies, light energy and radio frequency, which are used in skin cosmetology, and its core technologies are photon system, radio frequency system and epidermal cooling system. Light energy and radiofrequency can act synergistically on the skin, which is mainly applied to skin rejuvenation, spot removal, hair removal, wrinkle removal and other skin problems. However, the following risks may arise during the treatment process: 1. Phototoxic effect: mainly manifested as excessive light exposure for several hours, with well-defined erythema and edema in the area, which may be accompanied by burning pain and sensory hypersensitivity. The occurrence of phototoxic reactions can be prevented by using a suitable sunscreen several times during the first 24 hours of treatment; 2. Infection: viral or bacterial infections of the skin occur less frequently. Thorough cleaning of the treatment area before treatment can prevent surface bacterial infections, such as impetigo and cellulitis; 3, temporary peeling: aging necrotic tissues will naturally fall off, replaced by new healthy skin, peeling situation as the reaction after sun exposure, there will be no pain, you can improve the phenomenon of peeling through moisturizing products; 4, temporary bronzing: due to the degree of treatment of the different, the skin will be presented in the range of 3-14 days, ranging from temporary bronzing to temporary bronzing. Temporary bronzing: due to the different treatment degree, the skin will show 3-14 days of temporary deepening of skin color, need to strengthen the sunscreen; 5, too much light and radio frequency energy can lead to damage to the skin and deep tissues, blisters, scabs, skin necrosis, scar formation, adhesion of deep tissues, impaired neurosensory, pulling pain or numbness, and restricted activities.