Forever Bare BBL offers a comfortable treatment with virtually no downtime. During this treatment time, pulsed light delivery energy to the hair follicles. The rapid and short pulses of light you may feel are energy that is causing the hair follicle to stop producing hair without harming any surrounding tissues. Your hair grows in three stages: Anagen Anagen phase is when your hair grows – your hair follicle forms a new hair shaft. Most of your hair on your scalp is in a growing phase can last anywhere from 2 to 6 years. The catagen phase is followed by the anagen stage. Catagen Catagen phase is a transitional stage when the hairs are in phase at any time. This phase lasts for around two to three weeks. Growth stops and the outer root sheath shrinks and then attaches to the root of the hair. This formation is known as a club hair. Next is the telogen phase. Telogen Hairs don’t grow during the telogen phase, but they also don’t normally fall out either. The telogen phase is also when the new hairs start to form in follicles that have just released hairs during the catagen phase. Forever Bare BBL treats hairs in the anagen phase, since not all hairs come back within the same growth stage at the same time, multiple treatments are recommended to target all hair on the treatment site.