Key TakeawaysHyperglycemia (high blood sugar) is an early warning sign of diabetes. It causes symptoms like excessive thirst and hunger, increased urination, and fatigue.Symptoms develop gradually and may go unnoticed until more serious complications develop. Left untreated, it can damage blood vessels and nerves and may eventually harm the eyes, heart, kidneys, and feet.If you’re having symptoms of high blood sugar, it’s best to see your provider, whether you have already been diagnosed with diabetes or not.Hyperglycemia (high blood sugar) can develop gradually, with mild early symptoms like fatigue and thirst that may go unnoticed for years. Over time, high...
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