Remove hair on the arm, clinically preferred laser hair removal. Laser hair removal can make the melanin in the hair follicle preferentially absorb the laser light, which is converted into heat energy to produce high temperature locally, only destroying the hair follicle without damaging the surrounding skin in the middle, to achieve the purpose of permanent hair removal, basically no side effects. For the hair on the arm, it needs 3-6 times, the treatment effect is more obvious, 6-8 weeks treatment once. Generally speaking, after several times of laser treatment, the hair removal rate can reach more than 90%, even if there is hair regrowth, it is very little, very soft and lighter in color. For other methods, such as scraping, waxing, medicine removal, can not be compared with the effect of laser.