Here are common signs and symptoms that your blood sugar may be too high (hyperglycemia). These can happen whether you have diabetes or not, though they’re more common in people with diabetes: Common Symptoms of High Blood Sugar 1. Increased thirst (feeling thirsty all the time) 2. Frequent urination—especially waking up at night to pee 3. Dry mouth 4. Fatigue or feeling very tired 5. Blurred vision 6. Headaches 7. Increased hunger 8. Unexplained weight loss (more common when blood sugar has bee

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