Taking tweezers to your eyebrows can yield unpredictable results. So what determines if your eyebrows grow back after you pluck them?
Anyone who's taken tweezers to their eyebrows knows it can be a dangerous game. Sometimes, the hairs grow back just fine after plucking; other times, they never fully grow back, and you're stuck with thin brows that can't easily adapt to fashion trends.
To explain, let's begin with an introduction to how eyebrows grow in the first place. As with other hair on the body, eyebrows have three growth stages: anagen, catagen and telogen. Anagen is the stage of active growth, where cells divide and increase in number. In this stage, hair follicles adopt an onion-like shape, and hair fibers start to emerge from the follicles.
During telogen, the final phase of hair growth, hair stops growing and the follicles"rest." This phase typically lasts longer for eyebrow hairs than for scalp hairs, around four months or longer, compared with two to three months for scalp hairs, Harth said. The continuous cycle is possible because the hair follicles are rich in stem cells that make them capable of recurring growth and self-renewal, according to a 2022 review published in the journal Frontiers in Cell and Developmental Biology. However, a variety of factors, such as aging and hormonal changes and physical damage, can disrupt this otherwise-continuous cycle, resulting in hair loss.
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