Photon, also known as Intense Pulsed Light, or IPL for short, was launched in the United States in 2009. It is a broad-spectrum visible light. Its main indications are as follows: (1) pigmentary skin changes: freckles, sun-related pigmentation, age spots, chloasma and other skin changes; (2) vascular skin changes: superficial erythema (capillary dilation), facial flushing (red face), rosacea (capillary type) caused by red (3) skin texture diseases: fine wrinkles, enlarged pores, rough skin, etc.; (4) for normal epidermal aging, it can improve the skin color and smoothness to restore youth; (5) permanent hair removal (beard, axillary hair, body hair of the limbs, etc.). Treatment principle (1) IPL photon therapy instrument released by the broad-spectrum intense pulse light can be irradiated to the deep layer of the skin, effective action on the target tissue, pigment cells selectively absorb photon energy is destroyed, gradually decomposed and absorbed by the body; skin capillary expansion in the strong light irradiation, hemoglobin selectively absorb photon energy, photothermal action to close the capillaries, gradually decomposed and absorbed by the body. (2) While acting on skin pigments and dilated capillaries, intense pulsed light can stimulate the rearrangement of collagen fibers and elastic fibers in the skin to increase skin elasticity; in addition, the photothermal effect can enhance vascular function and improve circulation, thus achieving the therapeutic effect of eliminating wrinkles and reducing pores. (3) The pigments in the hair shaft and hair follicles have selective absorption of light, and the resulting photothermal effect can cause the temperature in the hair follicles to rise and denature, causing the hair growth cells to die, thus achieving the effect of permanent hair removal. The patient, although photorejuvenation can rejuvenate the skin and delay the effects of aging, it is only a cosmetic tool that incorporates modern technology and is not as amazing as many advertisements promote. The skin is suitable for almost all adults, but there are still certain contraindications, such as VI skin and people who have recently or will have sun exposure, pregnant women and other people should not receive photorejuvenation beauty; in addition, for different skin, different problems, the selection of parameters are different. In addition, the parameters used for different skin and different problems are different. Therefore, before preparing for photorejuvenation treatment, patients must have a full communication and analysis with a professional physician, and choose a regular medical institution and a well-known brand of equipment to avoid adverse reactions such as burns and hyperpigmentation.