What is the term for the period of active growth in hair?

The term for the period of active growth in hair is known as Anagen. This phase is crucial because it is during Anagen that hair follicles are at their most productive, leading to the lengthening and thickening of hair strands. The Anagen phase can last for several years, depending on various factors such as genetics and health, allowing the hair to grow significantly.

In contrast to Anagen, the Telogen phase is the resting stage, during which the hair is not actively growing and is preparing to shed. The Catagen phase is a transitional period where growth slows and the hair strand begins to shrink and detach from the follicle. The Exogen phase refers to the shedding of the hair, which marks the end of the growth cycle and the beginning of a new one. This cycle of hair growth is vital for understanding hair health and growth patterns.