It refers to hair shedding that commences during the growth stage of the hair growth cycle.It has shown to cause diffuse alopecia. This is in stark contrast to telogen effluvium where hair shedding onsets during the resting phase of the hair growth cycle.
It is generally associated to be caused by infections, toxins, autoimmune diseases, drugs, or radiations. Patients who are undergoing chemotherapy also have hair loss due to anagen effluvium.
Anagen hairs have long roots covered with the inner and outer root sheaths and they are pigmented. Minoxidil solutions, scalp cooling after chemotherapy are some of the ways to solve the problem caused by this.