For eyebrows , the cycle is completed in around 4 months , while it takes the scalp 3 -- 4 years to finish ; this is the reason eyebrow hair have a much shorter length limit compared to hair on the head .
For eyebrows , the cycle is completed in around 4 months , while it takes the scalp 3 -- 4 years to finish ; this is the reason eyebrow hairs have a much shorter length limit compared to hairs on the head .