High Blood Sugar (Hyperglycemia) Topic Guide

High Blood Sugar (Hyperglycemia) High Blood Sugar (Hyperglycemia): High blood sugar (hyperglycemia) is when the body's blood sugar rises. Blood sugar levels can be measured using a blood glucose meter. Diabetes mellitus is a common cause of high blood sugar. Symptoms include dry mouth, thirst, frequent urination, and fatigue. Treatment includes diet, exercise, and medications

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