Hair grows in cycles and the laser can only treat actively growing hairs, and a few treatments are needed to get them all. The number varies depending on how large of an area is involved, how long it takes your hair to grow and the hair texture and color. Each session will disable the follicle a little more, eventually destroying it. Your bikini line might require a series of 4-6 sessions, but a full Brazilian that removes hair from your entire area may require more treatments. Sessions should be scheduled 4-6 weeks apart. During your consultation, the technician will be able to provide more details on the estimated number of times you’ll need to come back after looking at the area.