During which hair growth phase does hair not grow and may eventually fall off?

The telogen phase is the resting stage of the hair growth cycle where hair follicles remain inactive, and no new hair growth occurs. During this phase, the hair is fully formed and can remain in the follicle for several weeks to months before it eventually falls out. This natural part of the hair cycle helps regulate hair density and allows the body to shed old hair, making way for new hair to enter the anagen phase—the growth phase. Hair falling out during telogen is a normal and healthy part of the hair lifecycle, indicating that the follicle will later usher in a new strand of hair as it transitions into the next growth cycle.