Definition of Laser Hair Removal A method of hair removal that destroys the hair follicles by laser irradiation to achieve hair removal results. Laser hair removal uses the principle of “selective photothermal effect” of laser. A laser light of a specific wavelength is applied through the epidermis and directly irradiates the hair follicle. The melanin in the hair follicle and hair shaft selectively absorbs the light energy and the resulting thermal effect causes necrosis of the hair follicle and the hair stops growing. The effect of laser hair removal Since the process of heat absorption and necrosis of hair follicles is irreversible, laser hair removal can achieve the effect of permanent hair removal. Laser hair removal is suitable for all parts of the body (upper and lower limbs, legs, chest, abdomen, hairline, facial beard, outside the bikini line) with unwanted black hair. Those whose hair removal by electric needle, medicine, electric tweezer or other instruments is ineffective or failed. Laser Hair Removal Pain Laser hair removal is one of the less painful hair removal methods among all hair removal methods. The results of many clinical trials show that most patients only feel the sensation of being “bounced by a rubber band”. In addition, each person feels pain differently due to their physical condition. Prior to laser hair removal, there is an “exposure test” phase to determine the patient’s pain level. The safety of laser hair removal has been approved by the FDA. This proves that the laser hair removal technology itself is not harmful to the human body.