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blackhead1 |
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blackhead1 comedo; a plug of keratin and sebum within the dilated orifice of a hair follicle. The color of blackheads is caused not by dirt but by the discoloring effect of air on the sebum in the clogged pore. Infection may cause the comedo to develop into a pustule or boil. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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