Excessive urination and frequent urination at night may be caused by physiological factors such as drinking too much water, or it may be caused by diseases such as prostate hyperplasia, chronic pyelonephritis and chronic renal failure. 1. Drinking too much water: If you drink too much water before going to bed or do not go to the toilet in time, it will lead to the inability of the body to excrete water, which will lead to frequent urination at night and excessive urination. 2. Prostatic hyperplasia: the etiology is still unclear, may be related to androgen levels, cellular imbalance, inflammation and other factors, mainly manifested in increased nocturnal urination, urinary urgency, urinary frequency, etc., and may also appear in the urine line bifurcation, urination difficulties. 3. Chronic pyelonephritis: the etiology is mainly related to E. coli infection, immunodeficiency, decreased estrogen level and other factors can also induce the disease. Patients will have repeated symptoms of urinary tract irritation, accompanied by low-grade fever, dull pain in the renal region, etc., which may lead to excessive and frequent urination at night. 4. Chronic renal failure: the cause of the disease may be related to hypertension kidney damage, polycystic kidney disease, hereditary kidney disease and other factors, patients may experience polyuria, increased nocturia, loss of appetite, fatigue and other symptoms. Nocturnal polyuria and frequent urination may also be caused by other factors. After excluding physiological factors, it is recommended to go to regular hospitals for consultation and examination to clarify the cause of the disease and then treat it for early recovery.