What is comedones?

Comedones are small, flesh-colored, white, or dark bumps that give skin a rough texture.

• The bumps are one type of acne.
• They are found at the opening of skin pores.
• A solid core can often be seen in  middle of the small bump.

Comedones arise when cells lining  sebaceous duct proliferate (cornification), and there is increased sebum production.

A comedo is formed by  debris blocking the sebaceous duct and hair follicle.

It is now known that comedones also involve inflammation (see causes of acne).

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