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Frictional alopecia
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<p>Frictional alopecia is the <a href="/facts/Loss_of_hair/uEPKUafl">loss of hair</a> that is caused by rubbing of the hair, follicles, or skin around the follicle. The most typical example of this is the loss of ankle hair among people who wear socks constantly for years. The hair may not grow back even years after the source of friction has ended. </p>