Diabetics must be monitored for signs of complications due to diabetes. They should see an eye doctor regularly to be checked for damage to the blood vessels in the eyes. If this is not found and treated early, it can cause blindness. They should have their urine or blood checked regularly for signs of kidney damage. They must check their feet for cuts, bruises, blisters, and so on at least every day. And they should have their feet checked regularly for nerve damage, circulation problems, and infections.