There are two common reasons for the black marks after shaving, the hair roots left in the pores after shaving, this is a normal phenomenon, if you want to improve it, you can consider laser hair removal; the other situation is the pigmentation caused by repeated shaving and shaving on the local skin, and this situation can be improved by chemical resurfacing, photoelectric treatment and other ways to improve it. 1. Laser Hair Removal: Through specific light wave irradiation to the root of the hair follicle, so that it absorbs the laser energy and produces heat energy to destroy the hair follicle in order to achieve permanent hair removal. 2. Chemical Peeling: A certain concentration of salicylic acid or fruit acid is used to act on the localized area of the black mark to promote the skin metabolism and exfoliation through acid, so as to achieve the effect of removing black. 3. Photoelectric treatment: through the selective photothermal mechanism targeted destruction of melanin, to remove the role of black marks. After shaving black marks generally do not have to worry too much, if necessary, you can go to the regular hospital to check whether the melanin deposits related, if accompanied by other uncomfortable symptoms recommended timely consultation.