Photon hair removal can not achieve a complete cure at one time. Because photon hair removal only works on the hair in the growth phase, but not in the growth phase of the hair, such as resting hair, because the hair follicle does not contain melanin particles, so this part of the hair is not effective, to wait for this part of the hair to become the growth phase, and then photon hair removal to be effective. Generally, an interval of about 8 weeks is needed to do the next treatment, and finally achieve a complete cure.