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Darker in color  than the surrounding skin, usually in shades

of brown or gray.
Thickened texture , thicker than normal skin.
Velvety or soft  to the touch.
These spots usually appear in body folds, although they can appear in different areas. The most common areas include:

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The back and sides of the neck.
The armpits.
The inguinal region (groin).
Under the breasts.
Around the elbows and knees.
The knuckles of the hands.

Unlike common dirt or dead skin cell buildup, these plaques  don’t disappear with washing, exfoliation, or vigorous scrubbing . That’s precisely one of the key indicators for differentiating them from other superficial causes.

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Why does this condition occur?
The most common cause of acanthosis nigricans is  insulin resistance . Insulin is a hormone produced by the pancreas that allows cells to use glucose from the blood as a