Normal people have 0-1 times of nocturia, is in the case of normal diet, drink more water before going to bed, nocturia may increase. Diabetic patients if the blood sugar control is poor, polyuria symptoms are more obvious, especially the increase in nocturia predominantly, nocturia has more than 2-3 times. Diabetic patients if the nocturia is in 0-1 times, it is a more normal phenomenon, suggesting that the diabetic patient’s blood sugar control is more stable. Changes in urine output, especially changes in nocturia, can to some extent suggest that diabetic patients with blood glucose control, but still to monitor the fingertip blood glucose.