What are early signs your blood sugar is too high?

Early signs of high blood sugar include frequent urination, as your kidneys work to flush out excess glucose. You may also feel unusually thirsty as a result of that fluid loss. Fatigue is common because your cells can't properly use glucose for energy. Blurred vision can occur when high glucose levels cause the lens of your eye to swell. Other early signs include headaches, difficulty concentrating, and slow-healing cuts or bruises. Some people notice increased hunger even after eating, because insulin resistance prevents cells from absorbing nutrients properly. If you experience these symptoms regularly, especially in combination, it's worth checking your blood sugar and consulting a doctor.