The whitening introduction procedure mainly uses ultrasonic micro mechanical vibrations to regulate the permeability of cell membranes and help the introduction of drugs, which, together with the effect of heat, can accelerate the absorption of the skin under the epidermis. At the same time, the mechanical massage action strengthens the blood circulation and metabolic function, so that the dehydrated or nutrient-deficient skin is replenished, and the small wrinkles gradually disappear. During the procedure, the following risks may be associated: 1. accelerated aging: the role of the importer is only to penetrate the whitening and moisturizing ingredients into the stratum corneum, during the operation will accelerate the aging of human skin, patients should consider carefully before the operation; 2. allergy: allergy is a common complication of this operation, for allergic or allergic to the introduction of fluid candidates are not suitable for application; 3. local skin redness: if the ultrasound If the temperature of the probe is too high, it is easy to burn the skin, resulting in skin redness and swelling. Therefore, patients should wash their faces with cold water or use medical masks after surgery, which can speed up epidermal repair and metabolism; 4, the effect of whitening introduction technology is not permanent, and can generally be maintained for 1 month. Its maintenance time is related to the patient’s own skin condition, doctor’s operation level and post-operative care. In addition, several treatments are needed to achieve the desired effect. 5, whitening agent for internal organ damage (liver, kidney damage); 6, importing too high a temperature leads to skin burns, scar formation, pigment loss or pigmentation, abnormal sensation.