9) Skin discoloration
This is one of the early signs of diabetes. You may notice a more like or even large, dark discoloration of the skin, especially on the back of your neck. This condition is called acanthosis nigricans, and it usually appears in obese people and those suffering from insulin resistance.
Besides obesity and diabetes, such discoloration of the skin may also be caused by thyroid disorders, ovarian cysts or cancer. Birth control pills and corticosteroids are also found to causes similar patches of skin discoloration. However, it can be due to diabetes if the discoloration is present with its other common signs and symptoms.
