Which is a sign or symptom of diabetes?

• A. Hypertension
• B. Weight gain only
• C. Polyuria (excessive urination)
• D. Insomnia

Answer: (C)

High blood glucose causes the kidneys to spill glucose into the urine when the concentration surpasses their reabsorptive capacity. Water follows the glucose into the urine, leading to increased urine production—polyuria. This osmotic diuresis is a classic sign of diabetes and is often accompanied by increased thirst and, over time, weight loss from fluid loss and metabolic changes. Hypertension can accompany diabetes but isn’t a direct symptom, weight gain isn’t typical as a primary sign, and insomnia isn’t specifically tied to diabetes.