Color light rejuvenation, also known as photorejuvenation, using different wavelengths of intense pulsed light, directly irradiated on the skin surface, can penetrate to the deeper layers of the skin, selective action on the subcutaneous pigment cells or dilated capillaries, and at the same time stimulate the deeper layers of the skin collagen newborn and elastic fibers to rearrange, remove facial skin pigmentation, and effectively improve the texture and elasticity of the skin, so that the skin to restore the youthful state. However, it also has certain hazards, as follows: 1, if excessive sunburn, can cause phototoxic reaction, mainly manifested as excessive light for several hours, in the area of well-defined erythema and edema, which may be accompanied by burning pain and sensory allergies; 2, some people in the treatment, due to the treatment dose is not set correctly, such as the equipment, mode, the parameters of the wrong choice, coupled with the individual sensitivity to the color light is different, it will be different levels of Pigmentation, hyperpigmentation or acne-like dermatitis; 3. Skin damage, scar formation and pigmentation are mainly caused by intra-operative operation as well as poor post-operative care. In conclusion, it is recommended that patients go to regular hospitals and choose experienced physicians to operate in order to ensure that skin rejuvenation achieves ideal results. If there are complications, sunscreen hydration, light spot treatment, and oral vitamin C, vitamin E, external use of Tranexamic acid, levulinic acid, etc., can make the pigmentation gradually fade.