A member asked:

People are always going on about whiteheads. what are they caused by?

A doctor has provided 1 answer

Blocked follicles: Whiteheads, or closed comedones, are due to hair follicles that are plugged by a combination of keratin (skin flakes) and sebum (skin oil).

Answered 11/30/2016

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What insect causes large red itchy bumps with whiteheads?

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