The principle of OPT photo hair removal is to use a broad spectrum of 610-1000nm intense pulsed light, adjustable pulse width, wide range, so it can be permanent hair removal on different colors and different parts of the skin, hair. It is based on the melanocyte absorption of light in specific wavelengths, which causes heat to the hair follicle and carries out selective destruction of the hair follicle to remove the hair, and it does not cause damage to the surrounding tissues.OPT photorespiration has no epidermal damage, no scars, no rebound and no pain. However, it also has certain side effects or minor hazards, as follows: 1, the skin after hair removal can not directly contact the sunlight, because ultraviolet light will be damaged hair follicles for secondary damage, easy to cause pigmentation phenomenon. After hair removal, try to stay indoors, it is best to wear long-sleeved clothing when going out, isolate the sunlight in a physical way, and pay attention to keep your clothing clean and dry to avoid infection; 2, after hair removal, many people feel that the skin will become dry and even itchy. After hair removal, we should carry out the work of nourishing and moisturizing, and at the same time avoid scratching the skin. After hair removal can not use skin care products containing fragrance, choose moisturizing products to choose containing natural ingredients, anti-allergy formula, texture clear moisturizing lotion, the best colorless and tasteless. As long as you do a good job of moisturizing, the skin naturally feel silky smooth, pores will not become coarse; 3, after hair removal may rarely lead to skin burns, and the skin without hair, will lead to inflammation and friction easily lead to skin rupture, but such symptoms appear less, patients do not have to be overly nervous, should promptly seek medical advice, under the guidance of the hospital to deal with.