Acanthosis nigricans is a darkening of the skin, usually around the neck but sometimes on knuckles, elbows or toes or around the armpits or the groin. Having acanthosis nigricans can a warning sign that a person is at risk for diabetes. This patient education brochure explains basic information about acanthosis nigricans in English and Spanish.

Explore the diabetes learning center. Website available in Spanish and English.

A flier created by the CDC's National Diabetes Education Program as a guide for patients in the management of medicines to treat diabetes. Available in English.