Many causes: Persons with darker skin complexions have many causes for the neck & face to be getting darker.
Answered 2/26/2013
5.5k views
Acanthosis Nigricans: Acanthosis nigricans (ak-an-thoe-sis nie-grih-kuns) is a skin condition characterized by areas of dark, velvety discoloration in body folds and creases. The affected skin can become thickened and may smell bad. See your doctor for treatment.
Answered 10/23/2012
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