Cardiovascular disease: Diabetes adequately increases the risk of various cardiovascular problems, including coronary artery disease with chest pain (angina), heart attack, stroke and narrowing of arteries.
Nephropathy: The kidneys carry millions of tiny blood vessel clusters that filter waste from the blood. Diabetes can damage this delicate filtering system. Serious damage can lead to kidney failure or irreversible end-stage kidney disease, which may require dialysis or a kidney transplant.
Alzheimer's disease: Type 2 diabetes may have chances of increasing the risk of dementia, such as Alzheimer's disease. The poorer blood sugar control, the greater the risk appears to be. Although there are many theories as to how these disorders might be connected, none of them has yet been proved.
Retinopathy: Diabetes can damage the blood vessels of the retina possibly leading to blindness. Diabetes also increases the risk of other serious vision conditions, such as cataracts and glaucoma.
Foot damage: Nerve damage in the feet or poor blood flow to the feet increases the risk of various foot complications. Left untreated, cuts and blisters can develop severe infections, which often heal poorly.
Depression: Depression symptoms are common in people with type 1 and type 2 diabetes. Depression can affect diabetes management.
Neuropathy: Excess sugar can injure the walls of the tiny blood vessels that nourish nerves, especially in legs. This can cause prickling, numbness, burning or pain that usually begins at the tips of the toes or fingers and gradually spreads upward.
Skin conditions: Diabetes may leave you more receptible to skin problems, including bacterial and fungal infections. Once, bacterial infections were life threatening, especially for people with diabetes.