The hot summer is here, many people want to get rid of “hairy hands and feet”, and choose laser hair removal. Of course, there are also many people who are afraid to use laser hair removal because they are worried that it may cause serious harm to their body. What are the hazards of laser hair removal? 1, harm hair follicles Laser hair removal although the surface of the skin will not cause damage, but the thermal light acts on the deeper layers of the skin, the hair follicles have damage to make them shrink. There may be a slight redness or local edema in the treatment area, which usually disappears within 12-24 hours. The skin keratin is very thin after the operation. 2.Laser hair removal has the hidden danger of pigment change Laser hair removal is a kind of non-ablative power therapy, which uses the selective principle of laser. Different wavelengths can be absorbed by different skin pigments, and it is easy to have the problem of pigment darkening or pigment whitening. For example, laser hair removal can easily burn the epidermis due to too strong energy, or ineffective due to insufficient energy to remove hair. 3, affect the sweating function Human sweating, is done through the sweat hair on the body, so remove will certainly have an impact on this function. Therefore, laser hair removal can easily affect the normal sweating function of skin pores. 4, may leave scars Laser hair removal has requirements for the quality of the treatment instrument, poor quality instruments, it is very easy to cause skin burns or leave scars. The danger of laser hair removal is related to the laser used for laser hair removal. Since the laser will only destroy the hair follicle cells in the anagen phase, it will not completely destroy the resting and degenerative hair follicles, so some of them will regenerate. Therefore, laser hair removal requires three or four sessions to achieve permanent hair removal, and each session must be separated by one month to two months. The growth cycle of hair follicles varies depending on the area of hair, for example, the growth cycle of beard is about four months, while back hair grows up to one year. The post-operative observation time can be decided according to the different areas of hair, and if the hair does not grow out after this observation time, then it can be called permanent hair removal. The ideal hair removal method, laser hair removal is fast, permanent, without side effects, and can remove large areas of hair at a time, among other advantages. There is no need to worry about the dangers of laser hair removal. Laser hair removal can achieve permanent hair removal in a more painless way, but it also requires several treatments, so when choosing a hair removal method, you may want to consider the area and size of the area to be removed. The only method that can achieve permanent hair removal at once is electro-acupuncture, but this method can only remove a small amount of hair at a time, and there are side effects of skin burning and injury.