Possible reasons for frequent urination at night: 1, urinary tract infection. Such as acute cystitis, urethritis, pyelonephritis, etc., there will be obvious frequent urination, urinary urgency, painful urination, accompanied by lumbar pain, pain in the lower abdomen and the feeling of incomplete urination. Patients frequently need to urinate and each time the amount of urine is not much, need to go to the hospital for urine routine examination and urine culture test to further identify. 2, male prostate hyperplasia. There can be frequent nighttime rising, with ageing symptoms progressive aggravation, and accompanied by urinary effort, urinary bifurcation or urinary dribbling, weakness, etc., the need for prostate ultrasound to further clarify. 3, when there is edema or cardiac function disease, when lying down at night when the increase in the amount of cardiovascular blood leading to increased circulatory capacity, the increase in blood filtered through the kidneys to produce more urination, generally not Accompanied by a history of painful urination, lower abdominal pain, and low back pain, cardiac function or routine urinalysis is needed for further identification.