Catagen Phase

The catagen phase is a stage of the hair growth cycle that involves the transition of the hair follicle from the growth (anagen) phase to a resting (telogen) phase. It typically lasts for 2-3 weeks and can be characterized by a gradual shrinking of the hair follicle and hair shaft. Its ultimate significance is the cessation of active growth and the transformation of the follicle into a ‘sleeping’ state. During this phase, the follicle is ultimately prepped for the telogen phase which is characterized by a temporary pause in hair growth where no new hair is made. Excessive hair shedding during this pause can occur due to underlying medical problems, aging, stress, or other factors. As such, the catagen phase is important for understanding hair health and identifying potential issues that may be preventing normal growth.