Needing to urinate at night

Category: Urinary & Kidneys · All urinary symptoms

What it can feel like

Needing to urinate at night (nocturia) means waking one or more times to pass urine. Once a night is common and often normal, especially with age; waking two or more times regularly, or a clear new change, is worth discussing because causes range from evening fluids to heart and hormone patterns.

Possible causes

A symptom can have many causes, and most are not serious. The lists below group conditions this symptom can be associated with — common causes first. They are possibilities to discuss with a clinician, not a diagnosis.

Common causes

Nocturia can be associated with drinking late in the evening (including alcohol), caffeine, water tablets taken late in the day, an overactive or sensitive bladder, and prostate enlargement in men.

Other possible causes

Nocturia can also be associated with producing too much urine at night, which happens with heart failure (fluid re-collecting when lying down), sleep apnoea, diabetes and age-related changes in the hormone that concentrates urine overnight.

Red flags — when to seek help promptly

Waking at night together with breathlessness lying flat or swollen ankles
Nocturia with extreme thirst and large urine volumes
Nocturia with blood in the urine or burning
Sudden change in night-time pattern with back pain or leg weakness

What a clinician may do

A clinician will ask about evening drinks, medicines timing, snoring and ankle swelling, test urine, and check blood sugar and kidney function. A frequency–volume diary (what you drink and pass, and when) is the single most informative test and is usually done at home.

Related guides on MedicalVideos.com

Frequently asked questions

Why does heart failure cause night-time urination?

Fluid that pools in the legs during the day returns to the circulation when you lie flat, the kidneys receive more blood flow, and urine production rises overnight. Nocturia plus swollen ankles plus breathlessness lying flat is a classic heart-failure pattern.

Is one trip a night abnormal?

Usually not — waking once is very common and increases with age. It becomes a symptom worth investigating when it is new, increasing, disrupting sleep significantly, or arrives with other urinary or general symptoms.

Related symptoms — Urinary & Kidneys

Being unable to pass urine Blood in the urine Cloudy or strong-smelling urine Difficulty starting to urinate Flank pain Foamy urine

Browse the N section of the A–Z list or return to the Symptoms A–Z hub.

Please note: This page is educational information about a symptom. A symptom alone cannot diagnose any condition, and the causes listed here are possibilities, not a diagnosis. If you are worried about a symptom — especially one that is new, severe, getting worse or not going away — please see your own clinician, who can examine you and arrange tests. In an emergency, call your local emergency number.