The laser or intense pulsed light delivers a pulse or several pulses of light energy into the skin where it is absorbed by the pigment in the hair follicle and, to a lesser extent, by the surrounding tissues.
The light energy is converted to heat energy and if the temperature of the hair follicle is raised to around 70ºC for the correct length of time, the follicle will be damaged and its ability to re-grow a hair is significantly reduced.
The most effective time for treatment is thought to be when the hair is in the active growing, or ‘anagen’ phase.
Anagen hair contains the most melanin and is better at absorbing light energy than hair in the resting (catagen) or shedding (telogen) phase.




