Prostate & urinary health

Free printable bladder diary

Two days, Letter size, two pages. Print it, keep a measuring jug in the bathroom, and take the filled sheet to your appointment.

Why two days of paper beats describing it

"I'm up two or three times a night" tells a doctor almost nothing on its own. Waking six times and passing a splash each time, and waking twice and passing a full bladder each time, are different problems with different causes and different treatments — and they sound identical when described out loud.

Volumes separate them. That is the whole reason this sheet exists, and it is why urologists ask for one.

How to fill it in

1. Measure every void, day and night, for two full days. Ounces or millilitres — just be consistent. A cheap measuring jug is all the equipment involved.
2. Include the first one after you wake up. It counts as part of the night, and it is the one everybody forgets.
3. Log drinks and rough amounts, especially after 6 p.m.
4. Tick "urgent" when you had to rush rather than simply needing to go.
5. Note bedtime and wake time so the overnight window is unambiguous.

What the numbers point to

Large volumes, and more than about a third of the daily total overnight. That is nocturnal polyuria: the body producing too much urine at night rather than the bladder failing to hold it. It is the most common driver in men over 50, and prostate treatments do not address it.

Small volumes, many trips. A storage problem — the bladder is not holding a normal amount. This is the pattern where an enlarged prostate or an overactive bladder is the likely explanation.

A large total across the whole 24 hours. A different signal again, and one that can point to poorly controlled blood sugar.

The full article on what separates these patterns →

Or how to use this sheet as a before-and-after when testing a supplement →

And the IPSS calculator, which scores the bother rather than the volumes →

Or use it as the baseline for a dietary elimination test →

This sheet is consumer education, not medical advice, and it cannot diagnose anything. Our editorial team are researchers and writers, not clinicians. Take the completed diary to a doctor rather than acting on it alone.