Sometimes, your blood glucose levels can fall too low. This is called hypoglycemia. If you think your sugar is low, test it. If you can't test your glucose right then, eat something with 15 grams of sugar, just to be safe. Too-high levels of glucose in the blood over many years can hurt your organs.
Diabetes can damage eyes, kidneys, and nerves.
It also makes heart and blood vessel disease more likely. The best defense against complications is taking good care of your diabetes. Keeping your glucose levels in control will make you feel better now. And it will help you stay healthy in the future.