Eyebrow hair growth follows a natural cycle that is similar to the growth pattern of hair on other parts of the body. This cycle consists of three main stages: the anagen phase, catagen transition, and telogen resting phase. Understanding these stages can help you better care for your eyebrows and manage expectations when trying to grow them out or repair thinning areas.

The first stage is called active growth stage. This is the active growth phase where hair follicles are producing new hair cells. For eyebrows, the anagen phase typically lasts between 28 to 49 days. This is much shorter than the anagen phase for scalp hair, which can last multiple years. During this time, your eyebrow hairs grow at a rate of about 0.14–0.16 mm. The length of this phase determines how long your eyebrows can grow before they naturally stop.

After the anagen phase comes the catagen stage. This is a short transitional period that lasts about up to 20 days. During catagen, the hair follicle contracts and severs its nutrient connection. Growth stops and the hair becomes what is known as a telogen hair. This means it is no longer connected to the living part of the follicle and will soon be shed. This phase acts as a transition from growth to dormancy.

The final stage is dormant phase. This is the resting phase and it lasts about one to two months. During telogen, the eyebrow hair remains in place but experiences no cellular activity. Eventually, the old hair is pushed out by a new hair beginning its anagen phase. This is why you might notice a small amounts of hair loss each day. It is a normal part of the cycle and not a cause for concern unless excessive shedding occurs.

The entire cycle for eyebrow hair takes about three to four months to complete. Because of this shorter cycle, eyebrow hair grows back more quickly than scalp hair but also reaches a significantly reduced potential length. Factors such as your DNA, life stage, diet, and hormone levels can affect how long each stage lasts and how healthy the hair appears. Using nourishing oils like ricin oil, olive oil, کاشت ابرو در تهران or jojoba oil or maintaining a balanced diet rich in biotin and protein can support stronger growth during the anagen phase.

It is important to avoid repeated aggressive hair removal methods as this can damage the follicles over time and lead to slower regrowth or even permanent thinning. Letting your eyebrows grow naturally through their entire growth process gives them the best chance to thrive. Patience is key since results take time and each hair is on its own schedule within the cycle.