Boston Acanthosis Nigricans Dermatologist

What is Acanthosis Nigricans?

Acanthosis nigricans is a skin condition that causes some areas of the skin to darken and thicken. This condition is not harmful but it is sometimes an indicator of other health problems such as pre-diabetes. Obesity is the primary cause of this skin condition.

Appearance

• Brown or black discoloration on your skin.
• Affected skin may feel velvety and thicker than the rest of your skin.
• Skin tags may form on the darkened areas of skin.
• Skin may itch.
• Skin may have a bad odor.

Where does acanthosis nigricans form?

Acanthosis nigricans may form on the armpits, neck, upper back, groin area, elbows, knees, knuckles, belly button, woman’s breasts, face, and female genitalia. It may take a while to form, ranging from months to years.

Who gets acanthosis nigricans?

Anyone can get this skin condition but risk factors include obesity, Native American, African, Caribbean, or Hispanic descent, and family with history of acanthosis nigricans.

Treatment

• This is a difficult condition to treat and aside from weight loss, treatments may have little to no effect.
• Prescription creams, ointments, and gels to lighten skin color.
• Antibiotics to apply on the skin and antibacterial soaps to reduce odor and discomfort.
• Topical vitamin A creams to help clear the skin.

Learn more at the American Academy of Dermatology: AAD Acanthosis nigricans.