Specific questions about laser hair removal: 1. What is the principle of laser hair removal? Laser hair removal is based on selective photothermal theory, the hair by selective absorption of laser energy, so that the hair follicle is damaged and can not grow hair again, while not damaging the surrounding tissue, so that the hair loses its ability to regenerate. 2.What is the treatment cycle of laser hair removal? It takes about 3-4 times, each time roughly 4-6 weeks apart. Because hair growth is divided into: anagen phase, regression phase and stationary phase, laser treatment can only destroy the hair follicles in the anagen phase, and has no obvious effect on the hair in the regression phase and stationary phase, and only when these hairs are transferred to the anagen phase can the treatment work, so laser hair removal often requires several times for the effect to be obvious. 3.What types of people and hairs are suitable? Laser hair removal is suitable for almost all people who have claims, but if you have a history of strong UV exposure just before the treatment, it is better to delay the treatment for a period of time; in addition, laser hair removal is suitable for dark and light colored hairs in all parts, but it is not effective for white hairs. 4.Will this treatment be painful? Is it safe? Laser hair removal is one of the less painful hair removal methods among all hair removal methods. The results of many clinical trials show that most patients feel the sensation of “being bounced by a rubber band”. When combined with the cooling of the skin, you can almost never feel pain again. The laser hair removal equipment introduced by regular hospitals are certified by international authorities and have been successfully treated tens of thousands of times worldwide, so safety can be guaranteed. The hair removal treatment process is simple, fast and safe. 5.Will laser hair removal affect perspiration? The laser only acts on the melanin in the hair follicle, but there is no melanin in the sweat gland so it will not absorb energy and damage the sweat gland, and there is no other adverse effect on the human body. Therefore, laser hair removal will not affect sweating. 6.Is the effect of laser hair removal permanent? Will it be regenerated? For the effect of laser hair removal, theoretically it is able to remove hair permanently, of course, the best effect is in the growth period of hair, the more melanin secretion, the better the effect of treatment. Since the hair is in different growth cycles at the time of treatment, most of the hair can be effectively removed after 4-6 treatments. However, with laser hair removal, some hairs may still regenerate, but the new hairs will become slimmer and less obvious, the effect varies from person to person, some people grow hairs after 6 months, but some people will not regenerate until 2 years later. 7.What do I need to pay special attention to before and after the treatment? First of all, the area to be removed should be cleaned and disinfected before hair removal, and a cold compress should be applied before treatment to reduce pain. Secondly, do not use hair removal cream, hair removal cream and other similar products before hair removal, and hair removal parts should not be plucked, waxed and electrolytic hair removal two weeks before treatment. For patients with type III-V skin with darker complexion, sun exposure should be avoided as much as possible before surgery, preferably with sunscreen for 4-6 weeks, and those with pigmentation tendency can add hydroquinone drugs for prevention at the same time. The treatment area must be thoroughly shaved before surgery. Again, after laser hair removal, we should pay attention to do a good job of sun protection, try to avoid exposure to the sun, and use sunscreen with SPF 30 or more. Finally, it must also be reminded that after hair removal, the skin must be protected with necessary moisturizing and proper application of medical skin care products that are more stimulating to the skin. To sum up, the advantages of laser hair removal are precision, short time, fast wound healing and low risk of infection, but you also need to take good care and strict sun protection after the procedure. However, laser hair removal is not perfect, it is most suitable for people with light skin tone and dark hair, because the treatment target of laser hair removal is locked in the “dark pigment”, so if your skin tone is dark, the laser will destroy the skin pigment together and cause white or dark spots, after that, it often takes several months to recover gradually, so before Therefore, before you undergo laser hair removal, you must go to a regular hospital for a professional evaluation before proceeding with the treatment.