Continual high levels of glucose in the blood are thought to cause:
A. Aging of the fibres in joints .
B. Damage to small blood vessels.
C. Atherosclerosis.
D. Damage to nerve fibres.
E. Clouding of the lens (cataracts).
F. Damage to retina (retinopathy).
G. Swelling of the macula (a tissue responsible for sharp, central vision).
H. Nerve damage resulting in loss of the pain sensation, callouses, sweating may diminished resulting in dry, cracked skin.
I. Impotence which could be due to a blockage or reduction of blood flow to the penis.
J. Nephropathy (Kidney failure). Diabetes can affect the small blood vessels in the kidney which are responsible for filtering the blood. As the filtering system becomes more and more inefficient, protein begins to leak into the urine. This may be one of the first indications of nephropathy.

What is NERVE damage?
The damage diabetes causes to nerve is called diabetic neuropathy. 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.
Symptoms of neuropathy may include:
Prickling, tingling, burning or jabbing feelings.
Loss of feeling .
Week muscles.
Fainting.
Bladder infections.
Diarrhea.
Sexual problems.

What is KIDNEY damage.
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. There are two treatments: dialysis, where machine cleans the blood and kidney transplant, where a person gets a new kidney from someone else.

What is EYE damage.
Diabetes can lead to an eye disease called diabetic retinopathy. Retina is the lining at the back of the eye that senses light. It acts like the film in a camera. In nonproliferative retinopathy, the milder form, blood vessels leak blood and fluid into the eye. In the more severe but rarer form, prolifertive retinopathy, new blood vessels sprout and grow out of control. They can bleed or cause scarring, which pulls on the retina.

What is SKIN problem.
Damaged nerves and narrowed blood vessels both can lead to dry, itchy skin. Poor circulation also makes infections more likely and longer lasting. Poor circulation also lead to various skin problems. These include spots of various colors, blisters, yellow bumps and rashes. Also, skin on the hands and toes may become waxy and tight.

High glucose levels provide an inviting home for germs, so people with diabetes are more likely to get gum infections. Poor circulation can slow down healing.

What causes IMPOTENCE in a diabetic man?
Nerve damage and poor circulation can both make it hard for men to have an erection.

What is Foot problem.
Nerve damage and reduced blood flow also take a toll on feet. When you can not feel your feet well, it is easy to bump and scrape them. Poor blood circulation keeps the sore from healing.

Can diabetes cause stroke or heart problems?
Diabetes makes you more likely to get hardening of the arteries or have a stroke. You can also have peripheral vascular disease, in which not enough blood reaches the area farthest from your heart. When you diabetes, your body chemistry changes. As a result, your blood may clot too easily, blood vessels may become narrow and fat may build up in the blood vessels faster.