Urinating once an hour at night may be caused by cystitis, or it may be caused by prostate hyperplasia, or it may be caused by diabetes. 1. cystitis: cystitis can lead to bladder irritation, making the patient to appear at night more than one hour to urinate once the symptoms, the patient can also appear urinary urgency, urinary pain, perineal pain, cloudy urine and other symptoms. 2. Prostatic hyperplasia: Prostatic hyperplasia can also lead to symptoms of urinating once an hour or so at night, and patients can also experience symptoms such as decreased urine output, difficulty urinating, thin and weak urine stream, and urinary retention. 3. diabetes: diabetes due to elevated blood sugar leads to increased urinary glucose, which in turn causes osmotic diuresis, can also lead to patients with the symptoms of urinating once an hour or so at night, the patient may also appear to drink more, eat more, weight loss and other symptoms. In addition to the above diseases, there are other factors that can also lead to the symptoms of urinating once an hour at night, it is recommended to go to the regular hospital in time for treatment, and strive for a speedy recovery.