ACN may refer to:
Acne, also known as acne vulgaris, is a long-term skin disease that occurs when hair follicles are clogged with dead skin cells and oil from the skin.
ACN, LLC (formerly ACN, Inc.) is a North-American based multi-level marketing (MLM) company which provides telecommunications, energy, merchant services and other services, depending on the country, through a network of independent sales agents known as "Independent Business Owners" (IBOs), who themselves can recruit new people as sales agents.
Acne Studios is a multidisciplinary fashion house based in Stockholm, Sweden with own-brand retail stores in locations around the world.
Founded in 2005, Acne Paper is a bi-annual culture magazine and the publishing arm of the Stockholm-based creative collective and fashion label Acne Studios (Ambition to Create Novel Expression).
Acne fulminans (also known as "Acute febrile ulcerative acne") is a severe form of the skin disease, acne, which can occur after unsuccessful treatment for another form of acne, acne conglobata.
Acne conglobata is a highly inflammatory disease presenting with comedones, nodules, abscesses, and draining sinus tracts.
Acnalbasac Noom (also known as Slapp Happy or Slapphappy) is an album by German/British avant-pop group Slapp Happy, recorded in Wümme, Germany in 1973 with Faust as their backing band.
The term acne cosmetica refers to acne caused by or aggravated by cosmetics. The mechanism was presumably a chemically induced plugging of the pilosebaceous orifice.