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Acanthosis Nigricans is a common skin condition characterized by patches of dark, thickened, velvety skin. These patches most often appear in the folds and creases of the body, such as the back of the neck, the armpits, and the groin. Although it may seem like a skin problem, it is usually a sign of an underlying medical condition, most frequently insulin resistance (the body’s inability to use insulin effectively).
read more about acanthosis nigricans ...The presence of Acanthosis Nigricans (AN) is a strong visual marker for high levels of insulin in the blood. When the body resists insulin, the pancreas produces more to try and compensate. This excess insulin spills over and interacts with skin cells, causing them to multiply rapidly and produce more pigment, resulting in the dark, thickened patches. Because of this link, AN is often an early warning sign of Type 2 diabetes.
The patches are most often observed in areas where the skin folds or rubs, including:
The condition is not contagious or harmful on its own, but it signals the need for metabolic screening.
The discoloration and skin thickening cannot be resolved with simple creams or cosmetic approaches. Improvement comes from addressing the underlying cause, which is most often insulin resistance. This can involve lifestyle changes such as diet and exercise, along with medication when needed to improve insulin sensitivity and manage blood sugar levels. As insulin levels decline, the affected skin often begins to lighten.
We know that a condition like insulin resistance, which can lead to diabetes, has a serious impact on vision health. Uncontrolled blood sugar can damage the blood vessels in the retina (diabetic retinopathy). Lens.com urges everyone to take warning signs like Acanthosis Nigricans seriously and to manage their metabolic health. If you have been diagnosed with a condition like diabetes, make sure you see your eye doctor regularly for dilated exams.
Is Acanthosis Nigricans always a sign of diabetes?
No, but it is highly suggestive of insulin resistance, which is the precursor to Type 2 diabetes. Less commonly, it can be linked to hormonal disorders, certain medications, or, very rarely, to internal cancer.
Can losing weight help clear up the skin patches?
Yes. Since Acanthosis Nigricans is tied to insulin resistance, significant weight loss, diet changes, and increased physical activity can improve insulin sensitivity, which often causes the dark patches to lighten or disappear.
Is Acanthosis Nigricans contagious?
No. It is a non-contagious skin reaction to a metabolic or hormonal imbalance within the body. You cannot catch it from another person.