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These Dark Patches on the Neck Could Be an Early Warning Sign of Diabetes

Many people notice dark, velvety patches of skin on the back of the neck and assume they are caused by dirt or poor hygiene. In reality, these patches may be a medical condition known as acanthosis nigricans, which can sometimes be an early warning sign of insulin resistance and an increased risk of developing type 2 diabetes.

What Is Acanthosis Nigricans?

Acanthosis nigricans is a skin condition that causes certain areas of the body to become darker, thicker, and softer in texture. The affected skin often feels velvety and develops gradually over time. Although it is most commonly seen on the back of the neck, it can also appear in the armpits, groin, elbows, knees, and other skin folds.

Unlike ordinary dirt or dead skin, these patches cannot simply be washed away with soap or removed by vigorous scrubbing. Because of this, people often become frustrated before realizing that the discoloration may have a medical cause.