The growth period of eyebrow hairs is about 2 months. The eyebrow growth cycle consists of three phases, the anagen phase, the resting phase and the shedding phase. The anagen phase is around 2 months, but the resting phase is longer, usually 3 to 9 months, and then shedding occurs. The entire growth cycle of eyebrow hairs is about 12 months long. In addition to relying on the blood circulation around the hair follicle to supply nutrients, the growth of eyebrow hair also relies on nerve and endocrine control and regulation. Eyebrow hair belongs to a kind of hair, the growth of hair is also affected by the factors of the site, for example, the growth cycle of hair is long and grows fast, so the length of the hair will be very long; while the growth cycle of eyebrow hair is short, the growth period is about 2 months.