Why do old pimples smell?
Rachel Davis
Updated on February 18, 2026
Over time, the pus pushes into the adjacent tissues and extrudes on the skin surface. Scar formation and disfigurement of the body are common with this type of acne. The
comedones
A comedo is a clogged hair follicle (pore) in the skin. Keratin (skin debris) combines with oil to block the follicle. A comedo can be open (blackhead) or closed by skin (whitehead) and occur with or without acne.
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