Radium skin purification is a certain wavelength of high energy light selectively acting on a certain part of the skin, which can directly reach the deep dermis, decompose abnormal melanin cell particles, inhibit excessive secretion of sebaceous glands and repair over-expanded capillaries, so as to achieve the effect of lightening pigmentation, removing acne and marks, refining pores and improving skin texture and skin tone. However, there are certain risks, which should be avoided, as follows: 1. Local pain: The local skin reaction of patients should be closely observed during treatment, the most common ones are local pain and skin flushing, which are obvious with pigmented lesions. Therefore, the operator should avoid repeated operations with high dose and intensity in the same area; 2. Skin fever: It is a common complication, and cold compresses can be applied for 20-30 minutes after treatment. After surgery, hot water should be avoided to clean the face, and cold water can be used to gently clean the skin; 3, dry skin: Patients with dry skin after surgery can apply moisturizing repair cream with simple ingredients after cleaning the skin at night; 4, excessive laser energy leads to skin burns, scar formation, pigmentation or pigmentation loss, and abnormal skin sensation. 4. The treatment effect cannot be maintained permanently, but can last 2-3 years, and the treatment cycle is long, requiring multiple treatments; 5. The treatment range is small and cannot treat multiple skin aging problems at the same time.