Small blood vessel (microvascular) diseases
Weakening of small blood vessels called capillaries causes blood to leak from the vessel.
Eyes: Damage to the retina, the part of the eye that captures images
Impaired vision and, in severe cases, blindness
Kidneys: Impaired functioning of the kidneys, and, in severe cases, kidney failure
Fatigue
Muscle cramping
Inability to think clearly
Swelling from retention of body fluids
Nerves: Decreased sensation, especially common in the feet and hands; weakness; abnormal functioning of some organ systems
Numbness, tingling, weakness in the feet and hands
Swings in heart rate and blood pressure
Nausea and vomiting from abnormal functioning of the digestive tract
Impotence in men
Double vision