A comedo is a clogged hair follicle (pore) in the skin.[2] Keratin (skin debris) combines with oil to block the follicle.[3] A comedo can be open (blackhead) or …
Blackheads: Also known as an open comedo, these are clearly visible on the surface of the skin. They are black or dark brown, due to the oxidation of melanin, …
Blackheads: Also known as an open comedo, these are clearly visible on the surface of the skin. They are black or dark brown, due to the oxidation of melanin, …