the Human Body / hair-follicle-cycle
Facts about Hair Follicle Cycle
- 05
Scalp hair loss known as telogen effluvium occurs when stress or illness prematurely shifts a large number of follicles into the telogen phase simultaneously.
- 04
Catagen, the brief transitional phase of the hair follicle cycle, lasts only about two to three weeks as the follicle shrinks and detaches from its blood supply.
- 03
In the telogen phase, hair follicles rest for approximately two to four months before shedding the old hair and restarting growth.
- 02
During the anagen phase, scalp hair actively grows for two to seven years, which determines the maximum length a person's hair can reach.
- 01
The hair follicle cycle consists of three main phases: anagen (active growth), catagen (regression), and telogen (resting).