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Diabetes Health Center

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Type 2 Diabetes - What Happens

When you have type 2 diabetes, your body still makes insulin. But as time goes on, your pancreas may make less and less insulin, which will make it harder to keep your blood sugar in your target range. If your blood sugar gets too high and stays too high for too long, your risk for other health problems increases. Over time, high blood sugar can damage many parts of your body camera.gif.


High blood sugar levels may cause temporary blurred vision. Blurry vision, floaters, or flashes of light may be a sign of diabetic retinopathy, which can cause severe vision loss.

To learn more, see the topic Diabetic Retinopathy.

Feet and skin

You may have less feeling in your feet, which means that you can injure your feet and not know it. Blisters, ingrown toenails, small cuts, or other problems that may seem minor can quickly become more serious. If you develop serious infections or bone and joint deformities, you may need surgery (even amputation) to treat those problems. Common infections can quickly become more serious when you have diabetes.

Heart and blood vessels

High blood sugar damages the lining of blood vessels. This can lead to stroke, heart attack, or peripheral arterial disease. Erection problems can be an early warning sign of blood vessel disease and may mean a higher risk of heart disease.


High blood sugar levels can damage nerves throughout your body. This damage is called diabetic neuropathy. There are three kinds of diabetic neuropathy:

To learn more, see the topic Diabetic Neuropathy.

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