The basic reason of the re-growth of hair even after permanent laser hair removal treatments is that all the follicles need to be in live state at the time of therapy. Laser treatment could not affect the hair follicles that are inactive during the initial sessions of laser hair removal surgery. Only the active or live follicles are deadening by the treatment. The inactive follicles start growing after the therapy, resulting in the hair re-growth. So more number of treatment sessions are required to kill such follicles to stop the hair growth.
The results of permanent laser hair removal are not good on dark people. The dark skin absorbs most of the laser energy leaving little energy for the follicle, which is not sufficient to kill the follicle. White or brown hair people also react in the same manner, as they are not able to absorb the energy required to deaden the follicle. So the treatment is more effective to the people with dark hair and fair complexion.


