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Results 1 - 1 of 1 for Lip hyperpigmentation
  1. Autoimmune Addison disease 
    ... Addison disease is abnormally dark areas of skin (hyperpigmentation), especially in regions that experience a lot of friction, such as the armpits, elbows, knuckles, and palm creases. The lips and the inside lining of the mouth can ...
    https://medlineplus.gov/.../condition/autoimmune-addison-disease - Genetics