Stages during the hair growth cycle
Each hair passes through three distinct stages during the hair growth cycle. These stages are called:
When you understand these stages you understand how laser hair removal works and why you need multiple treatments.
So, if the hair is up and about and has visible pigment it is in its anagen phase. Its pigments can absorb the laser and the follicle can be destroyed.
When the hair is its resting phase or catagen/telogen phase it is not visible or capable of absorbing the laser light and no destruction of the follicle will occur. So, it makes sense to have multiple treatments in order to obtain the 90% , +, or – 10% permanent reduction standard. The hair needs to be up and about in order to be destroyed.
