If you want to permanently remove underarm hair, you can deal with it through multiple laser hair removal or ice point hair removal. 1. Laser hair removal: the main use of laser photothermal principle, selective action on the melanin particles of the hair follicle, melanin particles absorb energy, the temperature rises sharply, destroying the hair follicle as well as the surrounding hair stem cells, to achieve the effect of removing hair. 2. Ice hair removal: mainly utilizes the melanin cells in the hair follicle to absorb specific wavelengths of light, generating a photothermal reaction that destroys the papilla portion of the hair follicle, destroying the hair follicle and thus achieving the effect of hair removal. However, the above two methods can only work on hairs in the growth phase, and have no effect on hairs in the resting and regression phases. Therefore, if you want to achieve permanent hair removal, you need to undergo laser hair removal or ice point hair removal treatment for several times. For patients with hairy underarms, it is recommended to consult a doctor in a timely manner, and strictly under the guidance of the doctor, through scientific methods of hair removal treatment.