Health Care Encyclopedia
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Blackheads (comedones) close-up Blackheads, or open comedones, are common in acne. Clogged hair follicles reflect light irregularly to produce this black hue.
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| Review Date: 4/27/2006
Reviewed By: Michael Lehrer, M.D., Department of Dermatology, University of Pennsylvania Medical Center, Philadelphia, PA. Review provided by VeriMed Healthcare Network.
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