How is nocturia diagnosed?

To help your healthcare provider diagnose nocturia, you can keep a fluid and voiding diary. This is a two-day record of how much you drink, how often you have to go the bathroom and how much you urinated (volume in mL’s). You should also record any medications you are taking, any urinary tract infections and any related symptoms. Your healthcare provider will review the diary in order to determine the possible cause(s) of and treatment for the nocturia.

Your provider may ask you the following questions:

  • When did this condition start?
  • How many times do you need to urinate each night?
  • Is there a large or small volume of urine when you void at night?
  • Has there been a change in urination output (increase or decrease)?
  • How much caffeine do you drink each day, if any?
  • Does frequent urination during the night keep you from getting enough sleep?
  • Do you drink alcoholic beverages? If so, how much each day?
  • Has your diet changed recently?

In addition to reviewing your voiding diary, your doctor may order a urinalysis to examine your urine for infection.

Last reviewed by a Cleveland Clinic medical professional on 01/06/2020.


  • National Association for Continence. Nocturia. Accessed 5/12/2020.
  • Marinkovic SP, Gillen LM, Stanton SL. Managing Noctura. BMJ 2004;328:1063.
  • Nocturia or Frequent Urination at Night. Accessed 5/12/2020.
  • American Urological Association, Urology Care Foundation. Nocturia. Accessed 5/12/2020.

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