If not well-controlled, diabetes either type 1 or type 2 can result in a number of debilitating complications. Some or these are due to negative effects on small blood vessels or microvasculature throughout the body. Thus, problems with vessels in the eyes (retinopathy), kidneys (nephropathy) and nervous system (neuropathy), can result in blindness, kidney damage, and/or pain and numbness in the legs and feet, respectively.
