After a certain number of treatments, the effect of permanent hair removal can be achieved. Ice point hair removal uses 810nm semiconductor laser, this wavelength can reach deep into the dermis, but is little absorbed by the epidermis, and the long pulse duration and high energy make the treatment need an epidermal cooler, so commonly known as “ice point hair removal”. After the laser reaches the deep dermis, it can quickly remove the hair in some parts of the body. Due to its new double pulse mode, it can ensure that no thermal damage will occur while heating and destroying the hair follicles, and no overheating reaction will occur. Ice point hair removal can inactivate the hair follicles and surrounding stem cells. Since there are anagen, regression and resting phases of hair, and laser hair removal only targets anagen hair, most patients need to undergo 5-8 times before they can achieve permanent hair removal.