The Skin On Your Neck Is Darker
High insulin levels can stimulate skin cell growth and melanin production. Known as acanthosis nigricans, this condition results in patches of velvety dark skin on your neck, groin, or armpits. This condition can affect anyone but is more common in darker-skinned individuals. This subtle change in skin color is among the earliest visible symptoms of prediabetes. This condition is also common in type 2 diabetes. Therefore, you should visit your healthcare practitioner if you notice any dark patches of skin on your neck.