First, hair removal is not specific. The principle of laser hair removal is photothermal kinetics. By reasonably adjusting the wavelength, energy and pulse width of the laser, the laser can penetrate the skin surface and reach the root of the hair follicle, which directly stimulates the hair follicle to lose its regeneration ability. Before the operation, the hair in the body needs to be removed. Cutting body hair short or shaving off one side will affect the therapeutic effect. If the hair removal before operation is not complete, it will recur repeatedly. Body hair is not completely pulled out. The remaining body hair will grow a new round of lush hair again under the action of body hormones. Therefore, before laser hair removal, hair removal must be done well.
Second, the hair growth cycle is fast. Many people's expected goal when doing laser hair removal is to remove the whole body hair once or twice, which is difficult to do. Only one laser hair removal can't achieve permanent effect. Because hair growth is divided into three cycles, that is, we often say growth period, static period and regression period. Hair removal is only in a certain period, and the other two periods are still in the growth period. In order to completely remove hair, it is necessary to repeatedly control the time of three cycles to get good results.
Third, plastic surgery institutions are not professional. The price of laser hair removal surgery is divided into three, six and nine. In order to save money, some people will choose lower-priced medical beauty and plastic surgery institutions for laser hair removal. However, these plastic mechanisms also have some problems. The machines in some institutions are not formal enough, and the professional level of doctors has not reached the national industry standards. Under the comprehensive influence of these factors, the hair removal during the operation will not be complete. Therefore, consumers must polish their eyes when choosing laser hair removal and choose a regular large-scale beauty and plastic surgery institution. In theory, laser hair removal needs three or more times to achieve better results.