Permanent hair removal treatment with IPL technology destroys the hair follicle. The flash lamp generates short, intense pulsed light energy that is emitted to the treatment area. The light energy is absorbed by the dark pigment (melanin) in the hairline, converted into heat and transferred through the hairline to the hair root. A thermal reaction then occurs in the hair follicle (i.e., in the hair root), permanently cauterizing the hair root and preventing it from producing new hair.