1.Atrophic spots on the calf: Brown “atrophic spots” on the calf are common diabetic skin lesions, which are neither painful nor itchy. Excessive blood sugar leads to unhealthy capillaries. As long as a slight bump or inflammation occurs, the skin will have such spots during cell repairing. The hemoglobin will be tied up by the high sugar and leads to pigmentations.

2.Darkening of the skin: If you find that a certain part of the skin has become dark and thick, as if it has not been cleaned, in which it is concentrated on the neck, armpits, knees, and groin, it may be known as

acanthosis nigricans. If the concentration of insulin in the blood is too high, it will interact with the skin’s keratinocytes and fibroblasts, that’s why the skin becomes darker and thicker.

3.Small yellow and red rashes on the skin: Due to high insulin and high sugar, the collagen in the dermal tissue is destroyed, causing inflammation around the blood vessels. This results in red rashes on the skin which looks like doughnut rings. Some rashes will appear on the back of the hands, fingers, and feet.