You have many hair follicles even in a small area. Targeting all of them in one session isn’t possible, but each session leaves you with fewer active hair follicles.
Multiple treatments are required to achieve the full hair removal effect. That’s because hair grows in three stages:
- Anagen (the growth stage). Hair is thickest and darkest, so laser treatments are most effective.
- Catagen (the transitional stage). The hair begins to loosen from its follicle.
- Telogen (the shedding stage). The hair falls out to make room for new growth.
The hairs on your body are not always at the same stage, so you’ll need to undergo a few treatments, an average of six weeks apart, to catch them all in the growth stage.
If you have darker hair on lighter skin, you will get the fastest results. The laser uses the contrast between hair color and skin color to guide it. A single area will typically take two to six sessions but there are times when more sessions might be required.
Note: The number of treatments will depend on the growth stage of your hair, as permanent hair removal can only occur in the Anagen growth stage. This is the reason several treatments are required. Each treatment will treat approximately 10% to 15% of the area being treated. After about 6 treatments you should have about 75% or more permanent hair reduction when the treatments have been performed at the proper schedule. Finer hair or darker skin types may require more treatments.