Bladder diary for overactive bladder and leaks: what to write down

19 October 2026· Updated 26 October 2026· 4 min read

An iPhone showing the app's Output sheet with volume presets and a Not measured button

In short

A bladder diary for overactive bladder (OAB) and leaks records four things on top of drinks, trips and times: whether a trip came with urgency, whether you leaked and roughly how much, whether you changed a pad, and what you were doing when it happened. The ICS and IUGA definitions of urgency and incontinence, the NICE and AUA guidance, and the clinic forms from the Urology Care Foundation, the NHS and BAUS ask for these in one form or another. How to record them so they can be read:

For overactive bladder and incontinence, a diary records four extra things: urgency, leaks and roughly how much, pad changes, and what you were doing when it happened.
Use the scale on your clinic's form and don't switch scales halfway. On a plain diary, put all four in the note column with the time.
Leak episodes are the measure most sensitive to missing days, so record every day you were asked for, including the good ones.

By Denis Zinin, developer of Bladder Diary: Fluid Balance. Not a doctor.

A plain bladder diary records drinks, trips and times. A bladder diary for incontinence or overactive bladder (OAB) needs four more things on the same sheet, because urgency and leaking are what the clinician is looking at: whether a trip came with urgency, whether you leaked and roughly how much, whether you changed a pad, and what you were doing when it happened. This article explains how clinic forms ask for those four, how to score them the same way every time, and where to put them when your diary has no column for them.

Why these four

The terms have precise definitions. Urgency is a sudden, compelling desire to pass urine which is difficult to defer; urinary incontinence is any involuntary leakage, and urge incontinence is leakage that comes with urgency; and overactive bladder is urgency, usually with frequency and night-time trips, with or without leaking.^1,3 The American guideline on overactive bladder includes a bladder diary in the evaluation,² and NICE asks women presenting with incontinence for a diary of at least three days and categorises the incontinence from the history: leaking with effort such as coughing, leaking with urgency, or both.⁴ The four extra columns are how the diary supports that sorting. “Leaked when I sneezed” and “leaked on the way to the toilet with a strong urge” are different findings, and the diary is where the difference is recorded with a time.

How do clinic forms record urgency and leaks?

Clinic forms differ in wording, not in substance.

Urology Care Foundation (AUA). For each trip: did you feel a strong urge to go, yes or no; did you leak, and how much; what were you doing at the time, “sneezing, exercising, etc.”⁵
NHS Gloucestershire. A bladder sensation score from 0 to 4: 0 no sensation, went for social reasons; 1 normal desire; 2 urgency that passed; 3 urgency, reached the toilet without leaking; 4 urgency and leaked. Plus LEAK written in the urine column, and a tick or a weight for each pad.⁶
University Hospitals Sussex physiotherapy. A yes for a strong, sudden urge, and a leak severity: D damp, W wet, V very wet.⁷
BAUS. A WET column with +, ++ or +++ for a small, moderate or large leak.⁸

The International Continence Society’s description of a bladder diary lists the same items: incontinence episodes, the degree of incontinence, pad usage, and urgency.⁹

Scoring the same way every time

Pick one scale, the one on your form, and use it for the whole diary. A “3” on day one and a “quite bad” on day three cannot be compared, and the comparison is the point. If your form has no scale, three levels are enough for leaks, small, moderate or large, and yes or no is enough for urgency. Write it at the time; a leak remembered in the evening tends to become “a bit” whatever it was.

Record the activity in a few words: coughing, laughing, lifting, standing up, on the way to the toilet, in bed. That is the column clinicians read to tell one kind of leak from another.^4,5

Where it goes on a plain diary

If your diary has only time, drink, volume and a note, the four items go in the note, with the time of the trip they belong to. Our printable template has a Note column labelled “urge, leak, pad, anything unusual” for exactly this, and its worked example shows a trip with “in a hurry, small leak”. In the app, urgency has a field of its own — an optional urge rating from 0 to 4, off until you turn it on — and leaks, pads and triggers go in the note; the report prints both next to their times. If your clinic wants its own scored columns, fill those in the way the form asks: a 0-to-4 urge rating is not the same scale as a form’s sensation score, and the comparison is what the scoring is for.

Night leaks and pads at night

A leak in bed is a night line: time, “leak”, how much, and whether you were asleep or on the way to the toilet. A pad changed at night is a pad line. Both belong between your bed and wake times so that the clinician can separate the night from the day; recording night-time trips explains how those times work.

Record the good days too

Leak episodes are the diary measure most affected by missing days. In a study comparing diary lengths, three days matched seven for the number of trips, the volume per trip, urgency and daily volume, but for incontinence episodes three days looked borderline;¹⁰ the fewer days you record, the more a single dry day or a single bad day distorts the picture. Record every day you were asked for, including the ones with nothing to report, and say which days are complete.

What the clinician does with it

They sort the events by kind, by time and by what triggered them, next to your drinks and your volumes, and read the whole thing against your history and examination. What they conclude, and what they suggest, is theirs; there are no thresholds on this page and no advice about what to drink or when. How to keep a bladder diary covers the rest of the record.

Need a paper version?

A free printable bladder diary with the same columns: A4 or US Letter, full pages or fold-in-half booklets. No email, no sign-up.

Free PDF templates

Questions

Do I write down a leak if I still made it to the toilet?

Write the urgency, not a leak. Urgency is the sudden, hard-to-defer need to go;¹ a leak is urine escaping before you got there. The NHS chart scores these separately: urgency you managed is a 3, urgency with a leak is a 4.⁶ Both lines are useful, and they are different lines.

How do I record pads?

Tick each change, with the time, in the pads column or the note. Some clinics ask you to weigh used pads, and the NHS chart gives the conversion, 1 gram to 1 ml;⁶ only do that if you were asked. A count of changes is the usual record.

How do I record urgency and leaks in the app?

Urgency has a field of its own: turn the urge rating on in Settings, and a trip can be rated from 0 to 4. Leaks and pads go in the note on the entry: "leak, small, coughing", "pad". The report prints both next to their times, so the clinician sees them in order. If your clinic's form has its own columns and scales, score those the way the form asks — a 0-to-4 urge rating and a form's sensation score are not the same scale.

References

Abrams P, Cardozo L, Fall M, et al. The standardisation of terminology of lower urinary tract function: report from the Standardisation Sub-committee of the International Continence Society. Neurourol Urodyn. 2002;21(2):167–178. doi:10.1002/nau.10052
Cameron AP, Chung DE, Dielubanza EJ, et al. The AUA/SUFU guideline on the diagnosis and treatment of idiopathic overactive bladder. J Urol. 2024;212(1):11–20. doi:10.1097/JU.0000000000003985
Haylen BT, de Ridder D, Freeman RM, et al. An International Urogynecological Association (IUGA)/International Continence Society (ICS) joint report on the terminology for female pelvic floor dysfunction. Neurourol Urodyn. 2010;29(1):4–20. doi:10.1002/nau.20798
National Institute for Health and Care Excellence. Urinary incontinence and pelvic organ prolapse in women: management. NICE guideline NG123. London: NICE; 2019. nice.org.uk
Urology Care Foundation. Overactive bladder diary. Linthicum, MD: American Urological Association; 2025. urologyhealth.org (PDF)
Gloucestershire Hospitals NHS Foundation Trust. Frequency volume chart: three day bladder diary. Patient information leaflet GHNHSFT/X941/05_16. gloshospitals.nhs.uk (PDF)
University Hospitals Sussex NHS Foundation Trust. Bladder record chart: pelvic health physiotherapy patient information. Reference 2198; 2023. uhsussex.nhs.uk (PDF)
British Association of Urological Surgeons. Information from BAUS about assessing fluid intake & output. Patient leaflet F24/016. BAUS; 2024. baus.org.uk (PDF)
International Continence Society. Bladder diary / frequency volume chart. ICS terminology discussion, Standardisation Steering Committee. ics.org
Konstantinidis C, Kratiras Z, Samarinas M, Skriapas K. Optimal bladder diary duration for patients with suprapontine neurogenic lower urinary tract dysfunction. Int Braz J Urol. 2016;42(4):766–772. doi:10.1590/S1677-5538.IBJU.2015.0292

This article explains how to keep a diary. It is general information from an app developer, not medical advice: your clinician decides what your diary means. Self-reported diary. Not a medical document.

Keep the diary on your phone

Two taps per entry, totals done for you, a PDF report at the end. No account, no server, nothing leaves your phone.