There are several types. They vary which part of the body the damaged nerves are. High glucose levels damage nerves. They no longer carry messages properly. Loss of feeling .
Diabetes can lead to the kidney disease called diabetic nephropathy.
Kidneys filter out waste from the blood. Sometimes diabetes causes the kidneys to lose their ability to filter properly. As a result, proteins that body needs is lost in the urine and wastes that body don't need build up in the blood. Kidney disease causes no symptoms until the kidney are badly damaged. Kidney damaged can not be reversed.