How does Hair Grow?


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Hair forms in a pouch-like structure below the skin called a hair follicle . What we see as hair is actually the hair shaft , which is the keratinized, hardened tissue that grows from this follicle.

Humans have more hair follicles per square inch of skin than most higher primates, including chimpanzees and gorillas. Because most of this hair is fine and pale (called vellus hair ), it usually isn't visible to the naked eye. Consider this: the forehead has more hair follicles than any other part of the body. The thicker, fully pigmented hair most people consider "real hair" is called terminal hair . This hair is found on scalp, eyebrows, legs, backs, underarms, and genital areas. This is the hair the Light Sheer diode laser treats.