Laser hair removal requires multiple treatments. Although one laser session can produce long-term hair removal, as a rule multiple treatment sessions are necessary to obtain optimal results. In large part this is due to the fact that laser hair removal is most effective for hair which is in the anagen phase. Anagen is the growth phase of hair. Since hair grows in cycles, not all of the hairs are in anagen at any given time.
Additional sessions are necessary to catch all of the hairs when they are in anagen.
Any area, except adjacent to the eye, where there is excess hair. The most common areas requested are the face, upper lip, neck, chest, periareolar, underarms, back, abdomen, bikini line, and legs. About permanent hair reduction by laser. Several of the newer lasers have clearly documented that there is permanent hair reduction after each treatment. The FDA has approved three lasers for permanent hair reduction, and more results with additional lasers are pending.