The causes of excessive daytime urination and low nighttime urination include physiological factors and psychological disorders, diabetes, cystitis and other disease factors. 1. Physiological factors: If you drink too much water during the day, this is a physiological phenomenon, do not need to worry. 2. Mental illnesses: if schizophrenia and other diseases, these diseases will trigger a decrease in the body’s secretion of antidiuretic hormone, so the phenomenon of daytime polyuria. 3. Diabetes: Due to the high blood sugar content of diabetic patients, too much solute will trigger excessive drinking, then the phenomenon of daytime polyuria will occur. 4. cystitis: due to the stimulation of inflammation, the phenomenon of urinary urgency will occur at this time, there will also be symptoms of urination. Finally, there may be other reasons why you urinate more during the day and less at night, so we suggest you consult a doctor in time.