Night-time urination, known as nocturia, can be connected to the bladder, the amount of urine your body makes overnight, sleep disruption or a mixture of all three.
What is nocturia?
Nocturia means waking from sleep to pass urine. One trip may be common, particularly as we get older. It becomes more important to assess when it is new, frequent, distressing, affecting daytime functioning or accompanied by other symptoms.
Nocturia is a symptom rather than a single condition. Understanding what drives it is more useful than simply trying to drink less.
When your bladder wakes you
Sometimes your bladder fills to a point that triggers a strong enough signal to wake the brain. This may happen because:
your bladder has a lower functional capacity
urgency signals are heightened
an overactive bladder is contracting during filling
infection, inflammation or GSM is making the bladder more sensitive
the bladder is not emptying fully before bed
A bladder diary can be helpful and may show several small night-time wees, urgency and similar daytime symptoms.
When you wake first
Insomnia, anxiety, pain, hot flushes, noise and changes in sleep habits and can cause you to wake. Once awake, you may become aware of a bladder sensation that would not otherwise have interrupted sleep.
This does not make the wee unnecessary or “all in your head”. The brain constantly interprets signals from the bladder – but being awake changes how much attention those signals receive.
If you are passing only small amounts and the urge is mild, sleep may be the first part of the puzzle to address.
Why might your body make more urine at night?
Nocturnal polyuria means that an unusually large proportion of the day’s urine is produced overnight. This is different from having a small or overactive bladder.
Possible contributors include late-evening fluids, alcohol, diuretic medicines, leg swelling that redistributes when you lie down, poorly controlled diabetes and some heart, kidney or sleep conditions.
Obstructive sleep apnoea can also be associated with nocturia. Repeated pauses in breathing affect sleep and hormone signals involved in urine production. Loud snoring, witnessed pauses, gasping, morning headaches and marked daytime sleepiness are reasons to discuss sleep apnoea with your GP.
Try a Bladder Care Diary
For at least three days, record:
what and how much you drink
when you drink it
when you wee
the approximate volume passed
urgency and leakage
bedtime, waking time and night-time trips
The volume is particularly helpful. Several small wees suggest a different pattern from several large ones.
Also note ankle swelling, snoring, hot flushes, pain and any medicines taken in the evening.
Should you stop drinking in the evening?
It can help to move more of your fluid intake earlier in the day and avoid large drinks close to bedtime. Caffeine and alcohol may worsen sleep, urgency or urine production for some people.
Severe fluid restriction or deliberately dehydrating yourself isn’t a good solution. Concentrated urine may irritate the bladder, and dehydration can contribute to constipation, dizziness and other problems.
Most general advice suggests to spread fluid steadily through the day, (but worth remembering that your individual needs may be different to this advice). If you have a heart or kidney condition, or have been told to restrict fluids, you should always follow your doctor’s clinical plan.
What else can help?
You may find that emptying your bladder before bed (without straining) helps to avoid night-time waking for a wee. It’s important to avoid repeated “just in case” visits throughout the evening as this can train the bladder to a new ‘habit’ by default.
If your ankles swell, ask a clinician whether leg elevation, movement or compression is appropriate for you – but don’t start compression garments if you have circulation problems without further advice.
Another thing that can help is to address constipation, as this can affect bladder storage and emptying. If you experience urgency (urge incontinence), bladder training and pelvic-health physiotherapy may help and your GP can make an appropriate referral for you.
If your symptoms have started following a medication change, it’s worth reviewing with a pharmacist or with your GP as some medications can cause urgency and leaks to occur. Don’t stop any prescription medicines without reviewing fully first - your GP is best suited to advise and offer an alternative.
When should nocturia be assessed?
If nocturia is persistent, suddenly worse or affecting sleep and daily life, we’d advise that you seek advice – and sooner if you also have pain, visible blood, recurrent infections, difficulty emptying, marked thirst, leg swelling or breathlessness.
The useful question is not simply, “How many times did you get up?” but rather, “What woke you, and how much urine did you pass?”. That is often where a frustrating night-time symptom starts to become a pattern that can be understood and treated.
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