The excess sebum combines with the dead cells and forms a plug, or comedo (also called comedones), that blocks the pore, which is not usually seen.— BeanRocket Blog Communities Lastest Posts
The blocked pores and follicles are medically known as comedo.— xml's Blinklist.com
A comedo can be either open or closed.— xml's Blinklist.com
An open comedo is commonly referred to as a— xml's Blinklist.com
The difference between them is that a blackhead, or open comedo, is open at the surface of the skin.— MyLinkVault Newest Links

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