Slow healing wounds or blurred vision

Diabetes causes wounds to heal more slowly for a variety of reasons. High blood sugar levels shrink your blood vessels over time, reducing blood circulation and preventing critical nutrients and oxygen from reaching wounds. Prolonged high blood sugar levels also harm your immune system, making it more difficult for your body to fight illness.

Blurred vision is common with uncontrolled diabetes. It can be caused by unexpectedly high blood sugar levels, which disrupt the small blood vessels in the eyes, allowing fluid to leak into the lens. Usually, the blurriness will go away. Still, consult an eye doctor as soon as possible. When you have high blood sugar levels for an extended period of time, you put yourself at risk for more serious illnesses that can lead to blindness, such as diabetic retinopathy.