You can expect to start seeing results after your very first session. During your treatment, the laser light travels through the length of hair that is in the follicle. Picked up by pigment in your hair, the laser light vaporizes each strand before transferring to the walls of the follicle. You get smoother skin right away and will likely have your next session before new hair growth starts to be seen. If new hair does grow in before your subsequent treatment, you can shave without compromising future results.