A Beam of laser light penetrates the skin reaching the hair follicle underneath. Actually the laser will use the hair shaft to deliver the energy to the base of the follicle where it will be destroyed.  One needs to have at least three sessions in the same area, spaced 4-6 weeks apart. That is because hair grows in three different phases and since only the hair visible at the surface of the skin will be reached by the laser light the process requires a minimum of three treatments.
Some patients will require more sessions. This depends on the type of hair, location, and the individual rate of hair growth. Some patients might have hormonal imbalances.
During the laser treatment some hair will be destroyed by the light, but since the rest of the hair is impared by the laser, the vast majority of excessive hair will come off over the next few days.
We recommend using a loofah glove or a towel to massage the treated area in order to promote hair loss.