Individuals may need multiple treatments for complete hair removal, depending on the treatment area.     That is because hair grows in three stages:   1. Anagen: The growth stage is when hair is the thickest and darkest, so laser treatments are the most effective. 2. Catagen: During the transitional stage, the hair starts to loosen from its follicle. 3. Telogen: The shedding stage is when the hair falls out to make room for new hair to grow.   Because the hair on your body is at different stages of growth, you will need to undergo a few treatments about six weeks apart to catch the hairs in the growth stage.