What is the catagen stage of hair growth?

The catagen stage of hair growth is referred to as the transitional period. During this phase, which follows the anagen (growth) phase, the hair follicle begins to shrink and detach from the dermal papilla, which is responsible for hair growth. This means that the hair isn't growing any longer but is also not fully inactive yet. The catagen phase signifies a transition where the hair strand is preparing to move into the telogen phase, where shedding occurs.

This understanding differentiates catagen as a unique stage that serves as a bridge between growth and rest rather than simply being a resting period or directly related to the shedding of hair. Recognizing the role of catagen as a transitional stage helps clarify its importance in the overall hair growth cycle.