A<unk>  is a clogged hair follicle (pore) in the skin. Keratin (skin debris) combines with oil to block the follicle. A<unk>  can be open (blackhead) or closed by skin (whitehead) and occur with or without acne. The word<unk> " comes from the Latin<unk> re, meaning "to eat up", and was historically used to describe parasitic worms; in modern medical terminology, it is used to suggest the worm-like appearance of the expressed material. The chronic inflammatory condition that usually includes<unk> nes, inflamed papules, and pustules (pimples) is called acne. Infection causes inflammation and the development of pus. Whether a skin condition classifies as acne depends on the number of<unk> nes and infection.<unk> nes should not be confused with sebaceous filaments.<unk> -type ductal carcinoma in situ (DCIS) is not related to the skin conditions discussed here. DCIS is a noninvasive form of breast cancer, but<unk> -type DCIS may be more aggressive, so may be more likely to become invasive.
Comedo
Wart
Scruple 
Purell
Superbill
Serenic
Rosette 
Aidoc