Which phase in the hair growth cycle is characterized by hair actively growing?

The phase in the hair growth cycle characterized by hair actively growing is the Anagen phase. During this phase, hair follicles are in a state of active division, producing new hair cells that push the older ones out. This results in the visible growth of hair strands. The duration of the Anagen phase can vary significantly among individuals, lasting anywhere from several years to decades, and is critical for achieving longer hair.

In contrast, the Telogen phase is a resting phase where hair is not growing but rather is prepared to fall out. Catagen is a transitional phase where the hair stops growing and the hair follicle shrinks, leading to eventual shedding. Understanding these phases is essential for recognizing the normal patterns of hair growth and loss in individuals, which can be important for assessing hair health.