DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Alopecia areata. Close-up of a bald patch in the stubble of a 57-year-old man's moustache. This condition produces localized areas of hair loss in which the bald skin looks and feels normal. It is known specifically as alopecia barbae when associated with the loss of beard or moustache hair. The cause is unknown and there is no specific treatment. The hair usually returns to normal within a few months.
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