ACN may refer to:
Acne vulgaris, also known as acne, 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 mechanica is an acneiform eruption that has been observed after repetitive physical trauma to the skin such as rubbing, occurring from clothing (belts and straps) or sports equipment (football helmets and shoulder pads).
Acne Studios is a multidisciplinary luxury fashion house based in Stockholm, Sweden with own-brand retail stores in locations around the world.
Acne with facial edema (also known as "Solid facial edema") occurs uncommonly, and is associated with a peculiar inflammatory edema of the mid-third of the face.
Acne keloidalis nuchae (also known as "Acne keloidalis", "Dermatitis papillaris capillitii", "Folliculitis keloidalis", "Folliculitis keloidis nuchae", and "Nuchal keloid acne") is a destructive scarring folliculitis that occurs almost exclusively on the occipital scalp of people of African descent, primarily men.
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.