Have you ever noticed dark patches on the back of your neck that do not disappear, no matter how much scrubbing or washing you try?
Many people assume these marks are simply caused by dirt, sweat, or poor hygiene. In some cases, however, persistent dark, velvety skin changes may be linked to an underlying medical condition known as acanthosis nigricans.
While this condition is not dangerous by itself, it can sometimes serve as an early warning sign that the body is developing problems with insulin resistance, which may increase the risk of type two diabetes.
What Is Acanthosis Nigricans
Acanthosis nigricans is a skin condition that causes areas of skin to become darker than the surrounding skin, thicker than normal, and soft or velvety in texture.
These changes most commonly appear in body folds such as the back of the neck, under the arms, the groin area, under the breasts, and around the elbows or knees.
Unlike ordinary dirt or dead skin buildup, these patches usually do not disappear with washing, exfoliation, or vigorous scrubbing.
Why Does It Happen
The most common cause of acanthosis nigricans is insulin resistance.
When the body becomes less sensitive to insulin, the pancreas produces more of it. Higher insulin levels may stimulate skin cells to grow more rapidly, leading to the characteristic thickened patches.
Risk factors include being overweight or obese, having prediabetes or type two diabetes, having a family history of diabetes, and certain hormonal conditions such as polycystic ovary syndrome, also known as PCOS. In rare cases, some medications or other medical conditions may also contribute.
Can Children Develop It
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