Laser hair removal actually uses a selective photothermal reaction, relying on melanin in hair follicles to selectively absorb the energy in the laser to produce high fever, and then kill hair follicle stem cells, so that hair can never grow again. So laser hair removal is permanent. If its bad influence is that it is impossible to grow hair in this part in the future, then it may be necessary to transplant hair if you want to have hair. In addition, due to the high fever during the treatment, the pain during the treatment is inevitable. Although advanced freezing point hair removal is used for treatment, there is still some pain, which may be an inevitable adverse consequence of laser hair removal. But the pain lasts for a short time, and basically it doesn't hurt much after depilation. In addition, there may be slight edema at the hair removal site. It is possible that some people with serious hair follicle reaction will have small papules near the hair roots and will soon recover. Generally speaking, laser hair removal has no permanent complications and no permanent damage, because the penetration depth of laser is limited, and it is a selective treatment scheme with little harm to other parts of the skin. Therefore, laser hair removal is still a very safe treatment method, which will not be broken, will not be damaged, and will not affect bathing and life.