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Which of the following is a common symptom of diabetes?
Correct Incorrect Frequent urination, or polyuria, is a hallmark symptom of diabetes mellitus resulting from elevated blood glucose levels (hyperglycemia). When blood glucose exceeds the renal threshold (~180 mg/dL), the kidneys cannot reabsorb all the glucose, leading to its excretion in urine (glucosuria). This osmotic effect draws excess water into the urine, increasing urine volume and frequency. This symptom reflects the body’s attempt to rid itself of excess glucose and is often accompanied by increased thirst (polydipsia). Clinically, recognizing polyuria is important for early diabetes detection and monitoring glycemic control.