Knowra Facial hair Facial hair Facial hair is hair that grows on the human face, especially beards, mustaches, and sideburns. Its growth and distribution vary with age, hormones, genetics, and individual biology.
Hair follicle : A small skin structure that produces a hair shaft and regulates its growth cycle. Facial hair emerges from follicles embedded in facial skin.
Terminal hair : Coarse, often pigmented hair that grows after a follicle matures, unlike fine vellus hair. Beards and mustaches consist chiefly of terminal hairs.
Shaving : The removal of hair at the skin surface by cutting it with a blade or other tool. Shaving is the most direct method of removing facial hair.
Beard tax : A tax imposed on beard wearing in certain historical societies, most famously by Peter the Great in Russia. The Russian beard tax made facial hair a target of state efforts to reshape appearance.
Androgen : A class of hormones, including testosterone, that influences sexual development and other bodily traits. Androgen signaling helps transform fine facial hairs into thicker terminal hairs.
Vellus hair : Short, fine, usually lightly pigmented hair covering much of the body. Facial follicles may produce vellus hair before androgen-driven maturation.
Beard : A growth of facial hair on the chin, cheeks, jaw, or neck, typically associated with adult men. A beard is a prominent form of facial hair with many grooming styles.
Sikhism : A monotheistic religion founded in Punjab in the fifteenth century, whose traditions include maintaining uncut hair. Uncut facial hair can express religious commitment among observant Sikhs.
Testosterone : A steroid hormone involved in sexual development, muscle and bone maintenance, and reproductive function. Testosterone and its derivatives influence facial-hair development.
Puberty : The period of physical development in which hormonal changes lead to sexual maturity. Facial hair commonly becomes more prominent during and after puberty.
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