Photorejuvenation (a) Principle: The biological stimulation of strong pulsed light improves skin elasticity, eliminates wrinkles and reduces pores; photothermolysis closes lesion vessels and breaks down pigments to achieve whitening effect. (B) Indications: skin wrinkles, enlarged pores, pigmentation, age spots, freckles, skin heterochromia, capillary dilation, facial redness (red face), rosacea and dull skin, etc. (iii) Side effects: The skin may be slightly red, and a few people experience mild redness and swelling, which usually recovers within a week. Second, phototherapy for acne IPL relies on its light and heat effects, which can be stimulated by endogenous porphyrins and release monomorphic oxygen ions to efficiently kill Propionibacterium acnes. It also allows more oxygen to enter the pores and further inhibit the growth of Propionibacterium acnes. IPL is suitable for treating patients with mild inflammation but many skin lesions. C. Photon wrinkle removal (a) Principle: IPL can repair the irregularly arranged collagen due to aging or photodamage; stimulate collagen production, fill the loosened skin space, remove wrinkles fundamentally and restore the skin to a youthful state, and achieve the best results after 90 days. Photon wrinkle removal has been certified by the FDA and is strongly recommended by international anti-aging centers! (B) Features: 1. short time: one treatment only takes 20-30 minutes; 2. non-invasive; 3. slightly painful; 4. no follow-up care; 5. no side effects: no physical or chemical adverse reactions; 6. stable effect: equivalent to the effect of other methods more than ten times, and stable to maintain 3-5 years. (3) Indications: wrinkles at the corners of the eyes (crow’s feet), lines between the eyebrows (head lines), wrinkles at the corners of the mouth, etc., suitable for all ages. Phototherapy for freckles (a) Treatment effect: Multiple treatments are needed to improve the symptoms significantly, but it is difficult to get rid of them completely. (2) Precautions: 1. small blisters may appear after treatment, which usually heal themselves in 3-5 days; 2. if pigmentation decreases, it will take 1 to 2 months to heal itself; 3. if pigmentation appears, topical hydroquinone cream can be applied, which will subside in 3 to 6 months; 4. thorough treatment requires 6 to 8 times; 5. avoid sunlight; 6. prohibit whitening skin care products. V. Photorespiration hair removal Using the selective photothermolysis principle of IPL hair removal. No special care is needed after the operation, with fast, light pain, lasting effect, no damage to the epidermis, significantly better than traditional drugs and laser hair removal. The parts of photon hair removal: lip hair, beard, hairline, armpit hair, chest hair, body hair, bikini line. Sixth, photon treatment of bright red nevus requires repeated treatment, lesions can be reduced, but complete elimination is difficult. Seven, photon therapy facial red (red face) The efficacy is certain, generally can achieve satisfactory results. Photon therapy for scar requires several treatments and can improve the appearance of scar.