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Acanthosis Nigricans Symptoms & Diagnosis


If you experience any of these symptoms, do not assume it is due to acanthosis nigricans. These symptoms may be caused by other health conditions. If you experience any one of them, see your physician.

  • Velvety-looking, dark areas on:
    • Back of the neck
    • Armpits
    • Groin
    • Elbow
    • Knees
    • Knuckles
    • Face
    • Palms
  • Acanthosis nigricans is often accompanied by skin tags .


Your doctor will ask about your symptoms and medical history, and perform a physical exam. Tests may include the following:

  • Skin biopsy
  • Blood tests
  • Endoscopy to rule out other causes
  • X-rays to rule out other causes


Endoscope in stomach
© 2009 Nucleus Medical Art, Inc.

Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition. Copyright © 2023 EBSCO Publishing All rights reserved.

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