Poliosis
Medical condition / From Wikipedia, the free encyclopedia
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Not to be confused with poliomyelitis, a viral disease that attacks nerves and causes paralysis.
Poliosis (also called poliosis circumscripta) is the decrease or absence of melanin (or colour) in head hair, eyebrows, eyelashes, or any other hirsute area. It is popularly known as white forelock when it affects hair directly above the forehead.
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Poliosis | |
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Depigmentation of sections of skin and hair in 48-year-old man with vitiligo and poliosis. | |
Specialty | Dermatology |
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This condition can cause single or, less commonly, multiple white patches on the hair. Some mistake these white patches for simple birth marks. In poliosis there is decreased or absent melanin in the hair bulbs of affected hair follicles; the melanocytes of the skin are usually not affected.[1]