Bedwetting in a teenager — what parents and teens should know

Bedwetting in a teenager carries a weight that bedwetting in a five-year-old does not. Sleepovers get declined. Summer camp becomes a problem to solve. The teen has usually been managing this for years, often without telling friends or parents. And by the time the family reaches my clinic, both the teen and the parents have been through several rounds of advice that did not work.

At this age, the cause of the symptoms can usually be identified objectively with a bladder diary. This article explains how I work through a teenager with bedwetting in clinic — what I look for, why urine testing comes first, what a reliable bladder diary tells me that no single test can, and what the treatment actually looks like.

A note on medications. Anticholinergics and mirabegron are prescription medicines with defined indications and side-effect profiles. Nothing here is a substitute for your doctor’s judgment, but knowing what the treatment options are, and roughly how long each takes to work, makes the next appointment more productive.

A note for teens reading this yourself. This article is written for you as much as for your parents. Bedwetting at your age is less common, but it is a problem we can treat with the right guidance and treatment. You are not doing anything wrong. Finding out why it is happening is the first step toward getting it under control.

Full article — 12-minute read

1. What causes bedwetting in teenagers?

In teenagers, I often find that bedwetting is related to a bladder capacity that is smaller than expected for age. This is particularly important when the child has never had a period of at least six consecutive months of dry nights — what we call primary enuresis.

In essence, bedwetting occurs when there is an imbalance between bladder capacity — how much urine the bladder can hold — and the amount of urine produced by the kidneys during sleep. If bladder capacity is too small, nighttime urine production is too high, or both occur together, the bladder fills during sleep. Children with enuresis may also have difficulty waking in response to a full bladder, so bladder fullness alone is often not enough to wake them.⁶

Another important distinction is secondary enuresis, which means that bedwetting returns after at least six months of dry nights. In some teenagers, there may have been several years of completely dry nights before bedwetting returns. In these children I pay particular attention to signs of an overactive bladder, such as urgency, frequent urination or urge incontinence.¹

Medical history gives me clues, but it cannot tell me how much the bladder actually holds or how much urine the kidneys produce during the night. That is why I always use the bladder diary. It measures functional bladder capacity and nighttime urine production and can reveal daytime patterns suggesting bladder overactivity.

This is important because two teenagers who both wet the bed may have very different underlying patterns. One may have a small functional bladder capacity, another may produce too much urine during the night, and another may have features of an overactive bladder. I therefore don’t decide on treatment from the history alone, and I evaluate the bladder habits first.

See how the diary separates the two patterns — bedwetting with a normal-sized bladder and high nighttime urine production →

2. What “overactive bladder” actually means

Overactive bladder (OAB) is a functional disorder — the bladder may be anatomically normal and capable of holding an age-appropriate volume, but the sensation of urgency appears before the bladder is expected to be full. In simple terms, the bladder signals “I need to empty” too early.

The International Children’s Continence Society (ICCS) defines OAB in children by one mandatory symptom: urgency, present at least once a week for three months, with a negative urine culture (no urinary tract infection).¹ The teenagers I see with OAB often have a more pronounced clinical presentation. Either the bedwetting is persistent and unresponsive, or the picture includes daytime symptoms too — daytime urgency, frequency (voiding 8 or more times a day), sometimes with urge incontinence (leaks that follow an urgent need to void), and these symptoms may occur every day.⁷

See a worked case — urgency and daytime leaks in a 9-year-old girl. The same clinical logic applies at 14 as at 9.

3. Test the urine and the bowel as a first step of the workup

Two things need to be excluded or treated before the rest of the diagnostic workup makes sense.

A urinary tract infection. Urgency and frequency look exactly like OAB but can be entirely driven by a UTI. Urinalysis and urine culture are therefore among my first steps when urgency and frequency are present. This is why the ICCS definition of OAB requires a negative urine culture.

Constipation. A chronically loaded rectum sits directly behind the bladder, reduces functional capacity, and can trigger overactivity — and parents may not know it is there. In a teenager with bedwetting, the bowel history and the Bristol stool type need to be reviewed, and if constipation is present, it is treated first. Details in a separate article: Can constipation cause bedwetting?²

Skipping either of these steps can contribute to an incorrect diagnosis or an apparently poor response to treatment.

4. Urgency is subjective — the diary makes it objective

The core problem in assessing OAB is that urgency is a subjective sensation. The teenager feels it. The parent can only see the consequences — rushing to the toilet, unusual timing (right after a previous visit, or as soon as the car pulls out of the driveway, or during outdoor play when the child suddenly has to find a toilet). Parents cannot know what the child feels; the child may not think to describe it.

This is the specific problem the bladder diary solves. Two days and three nights of bladder tracking gives me two things I cannot get any other way during the outpatient visit:

The maximum voided volume, which tells me whether the bladder capacity is small for age. And the median voided volume across all daytime voids, which tells me whether the child is systematically voiding small volumes even when the bladder isn’t full — the pattern that points to OAB.³

The BeDRY digital diary calculates both of these automatically, alongside expected bladder capacity for the child’s age, nighttime urine output, and the drinking pattern across the day.

5. Small bladder for age, or overactive bladder — what the numbers look like

Two thresholds run through everything below. Both come from ICCS standardization work and from my own clinical study on children with OAB.^1,3,8

Expected bladder capacity for age (EBC), in milliliters, is calculated as age in years × 30 + 30. A 5-year-old’s EBC is 180 mL. A 10-year-old’s is 330 mL. This is a working formula, not a hard biological cutoff — but it is what pediatric urology and nephrology use as the reference.

Small bladder capacity for age is defined as a maximum voided volume below 65% of EBC. For the 5-year-old, that is below 117 mL; for the 14-year-old, below about 293 mL.

Overactive bladder looks different on the diary. The maximum voided volume may be entirely normal — the bladder is big enough — but the child is voiding small volumes far too often. On average, the median voided volume across the day sits below 65% of EBC. That is the signature.

6. The Overactivity Index — turning the diary into one number

Because “median voided volume below 65% of EBC” is awkward to communicate and hard to compare across children of different ages, I proposed a single normalized metric in my 2022 clinical study on children with OAB: the Overactivity Index (OI).³

The OI is the median voided volume, normalized to EBC and rescaled so that values above zero mean the median sits below 65% of EBC. The further above zero, the smaller the typical void relative to what the bladder should hold.

In the same study, I tested whether OI actually tracks what a clinician cares about. I ran two comparisons:

• Against a two-week continence table — patients recorded every urination, every urgency episode, every urge or non-urge incontinence event. I counted total urgency episodes and correlated to OI. The correlation was linear: higher OI, more urgency.
• Against urodynamics — I compared OI to maximum cystometric capacity, the most reliable single number that comes out of a urodynamics study. The correlation was again linear: higher OI, lower cystometric capacity.

Both correlations were statistically significant. In practical terms, the OI provides an objective diary-based measure that reflects the severity of bladder overactivity without requiring a teenager to record every individual episode of urgency.

In our study, ROC analysis identified an OI above 23 as a useful cutoff associated with OAB, defined by an OABSS above 2. In multivariable analysis, OI > 22 was the only variable that remained significantly associated with OAB.³

For a family, this matters for a simple reason: the diary gives me an objective answer to a subjective symptom, without invasive tests. The BeDRY diary calculates OI automatically.

7. Treatment when the Overactivity Index is elevated

When the diary shows an elevated OI in a teenager with persistent symptoms, treatment may extend beyond standard urotherapy. Depending on the clinical picture, options include medication or neurostimulation. All of these sit on top of standard urotherapy — never instead of it.

Anticholinergics. The long-standing first-line pharmacological choice. Oxybutynin is the most widely used. In my clinical practice, solifenacin is another option.

Beta-3 agonists (mirabegron). A newer option, EMA-approved for pediatric use in more recent years. Different mechanism, different side-effect profile — sometimes better tolerated than anticholinergics, especially in adolescents.

Neurostimulation — parasacral TENS or PTNS. Nonpharmacological, specific to overactive bladder. In my practice for parasacral TENS, I use a pulse width of 200 μs, a frequency of 10 Hz, and a session length of 30 minutes. Patients can do this daily, or at least three times a week for around 20 minutes each. Some experts use a wider pulse width of 700 μs for deeper penetration. There is currently no standardized ICCS prescription for pediatric parasacral TENS, so each team runs its own protocol — an area where pediatrics still needs proper randomized controlled trials.⁴

The choice among these options depends on the clinical picture, the treating team’s experience, and what the teenager and family can realistically sustain.

8. Standard urotherapy — the foundation under everything

Standard urotherapy remains the foundation of treatment, whether or not medication or neurostimulation is also used. It is not simply a preliminary step before other treatment.

Standard urotherapy is the set of daily habits the ICCS lists as first-line for every child with lower urinary tract symptoms:⁹

• A regular voiding schedule during waking hours — voids on the clock, before urgency, roughly every 2–3 hours.
• Adequate fluid intake, correctly distributed across the day. Enough total volume, weighted toward morning and early afternoon, tapering in the evening. Avoiding provocative drinks (caffeine, carbonation) later in the day.
• Correct toilet posture for voiding: feet supported, unhurried, no straining.
• Regular bowel habits — sit on the toilet after meals to use the gastro-colic reflex.

This is exactly what Bladder Habit Builder is built to provide. For a teenager with an elevated OI, Coach supplies the day-to-day scaffolding — voiding schedule, fluid plan, posture videos, bowel routines. These daily habits provide the foundation on which medication or neurostimulation can be added when needed.

Coach is not a substitute for medical treatment. It is the daily-habits side of the plan.

9. Bladder treatment takes time

This is the part of the conversation I have most often with teenagers and their parents at the first visit, because expectations set the whole trajectory.

In clinical practice, I usually look for the first signs of improvement after about six weeks of consistent treatment. By around three months, it is easier to judge whether the approach is working. For many children and teenagers, treatment continues for 6–12 months and sometimes longer.⁵

Improvement does not necessarily mean that treatment should stop immediately. Bladder symptoms can recur after apparently successful treatment,¹⁰ which is one reason treatment is often continued and withdrawn gradually rather than stopped as soon as the child becomes dry.

Consistency matters. Changing treatment too quickly can make it difficult to know what is actually working. Details in a separate article: Ten reasons bedwetting treatment isn’t working — and what to do next.

10. Boys — when anatomy needs to be checked

A specific note for boys, and only for boys, because the anatomy differs.

If a teenage boy has not responded to a full year of appropriate treatment, or if the presentation includes signs of obstruction — a history of urinary tract infections, hesitancy at the start of voiding, straining to void, or measurable post-void residual urine — then anatomical causes need to be excluded before continuing to escalate functional treatment.

The first step is a uroflowmetry with post-void residual measurement. This is the reason I do uroflow with PVR in boys with this presentation pattern. If that raises concern, the next steps are urodynamics or referral to a pediatric urologist to inspect the urethra for late-presenting posterior urethral valves (PUV).

Late-presenting PUV remains a debated area in pediatric urology, particularly regarding which boys warrant further invasive investigation. This question was the focus of my 2018 study using a deep artificial neural network to predict posterior urethral obstruction in boys with lower urinary tract symptoms.¹¹ I also participated as the nephrologist on an international expert panel that developed a Delphi consensus on risk assessment in anatomical infravesical obstruction of boys in 2024.¹²

The clinical point for parents is this: if a teenage boy with bedwetting is not responding as expected, the workup should stay honest — anatomy needs to be considered, but it is not the answer for most boys, and jumping to it too early can lead to unnecessary invasive procedures.

In short — the order I work through in clinic

1. History question one: Has there ever been a period of at least six consecutive dry months? → distinguish primary from secondary enuresis and look for clues to reduced bladder capacity, nocturnal polyuria or OAB.
2. Urinalysis and urine culture among the first steps when urgency and frequency are present.
3. Bowel history and Bristol type. If constipation is present, treat it before the rest of the workup makes full sense.
4. Two-day, three-night bladder diary. Look at maximum voided volume vs. EBC (is the bladder small?) and Overactivity Index (is it acting overactive?).
5. Reduced bladder capacity or signs of OAB → standard urotherapy first; depending on the clinical picture and response, consider an anticholinergic, mirabegron or neurostimulation.
6. Reassess at 6 weeks and 3 months. Full treatment course usually 6–12 months.
7. In boys not responding after a year, or with signs of obstruction → uroflow with PVR, consider UDS or urology referral for late-presenting PUV.

Overactive bladder — in practice

Urgency and daytime leaks in a 9-year-old girl

Dry until she was seven, then urgency several times a day and leaks she hides with pads at school. Her bladder capacity was normal, but her median void was small — the diary showed an elevated Overactivity Index. The same clinical picture applies at 14 as at 9.

See how BeDRY worked through this case

References

1. Nevéus T, Fonseca E, Franco I, et al. Management and treatment of nocturnal enuresis — an updated standardization document from the International Children’s Continence Society. J Pediatr Urol. 2020;16(1):10–19. doi:10.1016/j.jpurol.2019.12.020
2. Burgers RE, Mugie SM, Chase J, et al. Management of functional constipation in children with lower urinary tract symptoms: report from the Standardization Committee of the International Children’s Continence Society. J Urol. 2013;190(1):29–36. doi:10.1016/j.juro.2013.01.001
3. Abdović S, Colić M, Stemberger Marić L, Ćuk M, Hižar I, Milošević M. Overactivity index: A noninvasive and objective outcome measure in overactive bladder in children. J Pediatr Urol. 2022;18(3):352.e1–352.e7. doi:10.1016/j.jpurol.2022.03.012
4. Barroso U Jr, Viterbo W, Bittencourt J, Farias T, Lordêlo P. Posterior tibial nerve stimulation vs parasacral transcutaneous neuromodulation for overactive bladder in children. J Urol. 2013;190(2):673–677. doi:10.1016/j.juro.2013.02.034
5. van Gool JD, de Jong TPVM, Winkler-Seinstra P, et al. Multi-center randomized controlled trial of cognitive treatment, placebo, oxybutynin, bladder training, and pelvic floor training in children with functional urinary incontinence. Neurourol Urodyn. 2014;33(5):482–487. doi:10.1002/nau.22446
6. Nevéus T. Nocturnal enuresis — theoretic background and practical guidelines. Pediatr Nephrol. 2011;26(8):1207–1214. doi:10.1007/s00467-011-1762-8
7. Franco I, von Gontard A, De Gennaro M; International Children’s Continence Society. Evaluation and treatment of nonmonosymptomatic nocturnal enuresis: a standardization document from the International Children’s Continence Society. J Pediatr Urol. 2013;9(2):234–243. doi:10.1016/j.jpurol.2012.10.026
8. Austin PF, Bauer SB, Bower W, et al. The standardization of terminology of lower urinary tract function in children and adolescents: update report from the Standardization Committee of the International Children’s Continence Society. Neurourol Urodyn. 2016;35(4):471–481. doi:10.1002/nau.22751
9. Nieuwhof-Leppink AJ, Hussong J, Chase J, et al. Definitions, indications and practice of urotherapy in children and adolescents: a standardization document of the International Children’s Continence Society (ICCS). J Pediatr Urol. 2021;17(2):172–181. doi:10.1016/j.jpurol.2020.11.006
10. Kim A, Lee KS, Kim TB, et al. Incidence and risk factors of recurrence of overactive bladder symptoms after discontinuation of successful medical treatment. Investig Clin Urol. 2017;58(1):42–47. doi:10.4111/icu.2017.58.1.42
11. Abdović S, Ćuk M, Ćekada N, et al. Predicting posterior urethral obstruction in boys with lower urinary tract symptoms using deep artificial neural network. World J Urol. 2019;37(9):1973–1979. doi:10.1007/s00345-018-2588-9
12. Leerssen ECM, Lindeboom SNS, Chrzan R, Abbas TO, Garvelink M, Schroeder RPJ. Seeking clinical consensus on risk assessment in anatomical infravesical obstruction of boys — a Delphi study. J Pediatr Urol. 2024;20(6):1142–1151. doi:10.1016/j.jpurol.2024.07.026 — Dr. Abdović participated as a Delphi panel member (listed in the Acknowledgements).