Diabetic patients with polyuria can experience thirst and excessive drinking at any time of the day, accompanied by polyuria, and for men, a significant increase in nocturia at night. Polyuria is an osmotic diuretic symptom of diabetes mellitus. This symptom is due to the high blood glucose in patients with diabetes mellitus. When the blood glucose is too high, it leads to an increase in the renal glucose threshold, and the urine is filtered out in the form of raw materials, which increases the permeability of the glomerulus and increases the filtration rate of the glomerulus and the excretion rate of the urine by the tubules. Diabetic polyuria is a typical symptom of increased blood glucose and one of the symptoms of poor glycemic control in diabetic patients.