What type of hair is associated with the initial growth phase?

The initial growth phase of hair is referred to as the anagen phase. During this phase, hair follicles are actively producing hair, and the strands are at their longest and strongest. Anagen hair is characterized by continuous proliferation of keratinocytes and high metabolic activity in the hair matrix, leading to robust hair growth. This phase can last a considerable time, ranging from several months to several years, depending on the individual's genetics and the specific location of the hair on the body.

In contrast, vellus hair is fine, short, and lightly pigmented hair typically found on the body, and it does not experience the same level of growth as during the anagen phase. Terminal hair, on the other hand, refers to thick, dark, and long hair that is fully matured and has completed the anagen phase, often growing in areas such as the scalp or beard. Catagen hair represents a transitional phase where hair growth is halted and the hair follicle begins to shrink, leading to the eventual shedding of the hair. Understanding these phases helps in recognizing how hair growth cycles affect waxing procedures and the effectiveness of hair removal methods.