What are symptoms of acanthosis nigricans?

What are symptoms of acanthosis nigricans?

Signs of this skin condition include:

• Patches of brown or black skin.
• Skin that feels velvety.
• Skin tags.
• Itchiness.
• Foul-smelling skin patches.

Symptoms tend to appear slowly, over months or even years. If these signs appear suddenly, see a dermatologist. It may be a sign of cancer.