Childhood urinary tract infections (UTIs)
Diagnosing and treating a urine infection in a child, confirming it with proper urine testing, and arranging the right scans afterwards if the infection is unusual or keeps coming back.
✓ Medically reviewed by a GMC-registered consultant · last reviewed September 2026 · next review September 2027 · how we review
In short
- A UTI should be confirmed with a proper urine test wherever possible, not just assumed — this avoids both missed infections and unnecessary antibiotics.
- Most UTIs clear up well with a course of antibiotics, but a very unwell child or a young baby may need urgent, hospital-based treatment.
- Recurrent or atypical UTIs, and UTIs in babies, need imaging (such as an ultrasound, and sometimes a DMSA or MCUG scan) to check the kidneys and urinary tract.
- A baby or child who is very unwell, has a high fever, or a rash that does NOT fade under a clear glass needs urgent help — call 999.
A plain-English summary. The detail — including risks and recovery — is below.
At a glance
A general guide. Your specialist will give you advice for your situation.
Proper testing confirms whether it really is a UTI, so the right children are treated and others are not given antibiotics needlessly.
Treating a presumed UTI with antibiotics without trying to confirm it with a urine test (where practical) is not best practice.
Symptoms usually start to improve once the right antibiotic is started; keep your child well hydrated and finish the course.
Confirmation of the diagnosis with urine testing and a clear antibiotic plan.
Symptoms usually start to improve once the right antibiotic is started; keep your child well hydrated and finish...
The urine culture result comes back, confirming the infection and the best antibiotic; treatment is adjusted if...
Symptoms have usually settled. Seek advice if your child is not improving or gets worse rather than better.
An ultrasound may be done during or soon after the illness; a DMSA scan, if needed, is usually a few months later.
What is a childhood urinary tract infection and how is it managed?
A urinary tract infection (UTI) is an infection of the bladder or kidneys. In children it can cause symptoms like pain on passing urine, going more often, tummy or back pain, bedwetting that is new, smelly or cloudy urine, or simply a fever — and in babies it can be vague, with just a temperature, being off feeds, vomiting or being irritable.
The key principle is that a UTI should be properly tested for, not just assumed. Whenever it is practical, a urine sample is taken and tested — a quick dipstick, and often a laboratory culture to confirm the infection and which antibiotic will work. Catching it correctly avoids both missing a real infection and treating one that is not there.
Most UTIs are treated with a course of antibiotics and clear up well. The other important part is afterwards: in younger children, and where a UTI is unusual (atypical) or keeps coming back (recurrent), national guidance recommends scans to check the urinary tract — because a small number of children have an underlying difference, such as urine flowing back towards the kidneys (reflux) or a structural problem, that needs picking up.
This guide is about getting the diagnosis right, treating the infection, and knowing when scans are needed.
Types, options & approaches
There may be different ways to do this. The right approach depends on the clinical question and your circumstances.
When are scans needed after a UTI?
| Situation | Ultrasound | Further scans (DMSA/MCUG) |
|---|---|---|
| First UTI, responding well (older child) | Not routinely | Not routinely |
| Baby under 6 months | Yes | Often, depending on findings |
| Atypical UTI | Yes, often during the illness | Often (DMSA; MCUG in some) |
| Recurrent UTI | Yes | DMSA; MCUG in selected cases |
This is a simplified summary of NICE guidance. The exact scans depend on the child's age and the details, and your clinician decides.
Preparing for your treatment
- Note your child's symptoms and when they started — pain passing urine, fever, tummy/back pain, smell, or new wetting.
- If asked to bring a urine sample, follow the clinic's instructions on how to collect it cleanly; ask for a collection pad or bottle for a baby.
- Try to provide a sample before any antibiotics are started, if possible, so the test is accurate.
- List previous UTIs, any scans already done, and any known kidney or bladder problems.
- Note your child's usual toileting, drinking, and any constipation (which can contribute to UTIs).
- Bring a list of medicines and any allergies, especially to antibiotics.
- For a young baby, or if your child is very unwell, seek help urgently rather than waiting for an appointment.
What happens
The clinician asks about symptoms and examines your child. Wherever practical, they take a urine sample — ideally a clean 'catch' sample, or a collection pad for a baby — and test it with a dipstick for signs of infection. Many samples are also sent to the laboratory for a culture, which confirms the infection and shows which antibiotic will work; this usually takes a couple of days.
If a UTI is likely, antibiotics are started, often before the culture is back, and adjusted later if needed. A short course usually treats a bladder infection; a kidney infection or a more unwell child needs a longer course, and a very unwell child or a young baby may be admitted for antibiotics into a vein.
Afterwards, the clinician decides whether scans are needed. In babies, and where the UTI is atypical or recurrent, an ultrasound is arranged (sometimes during the illness), and further scans (a DMSA scan to look at the kidneys, or an MCUG to look for reflux) may follow depending on age and findings. They will explain the plan, how to prevent further UTIs, and when to seek help.
Is this treatment right for me?
A good consultation should explore whether it's the right choice for you now — including reasons to wait or consider something else.
May not be suitable if…
- Treating a presumed UTI with antibiotics without trying to confirm it with a urine test (where practical) is not best practice.
- Antibiotics are not appropriate for bacteria in the urine without symptoms (asymptomatic bacteriuria), as treating it does not help and can cause harm.
- A routine first UTI in an older child that responds well does not usually need scans, so investigations should not be over-ordered.
- A child who is seriously unwell or a young baby with a fever needs urgent assessment, not a routine wait for an appointment.
Delay or rearrange if…
- Treatment should not be delayed when a child is unwell — but routine scans are usually arranged after the acute infection, not during it (except where guidance advises an acute ultrasound).
- If a clean urine sample cannot yet be obtained in a stable child, a little time to collect one properly improves accuracy — but never delay care in an unwell child.
- Non-urgent investigations may be deferred if the child is acutely unwell and needs treatment first.
Alternatives to discuss
- Confirming the diagnosis with urine testing before committing to antibiotics, where the child is well enough.
- Treating contributing factors (constipation, toileting habits) to reduce recurrence.
- Watchful management of bacteria without symptoms, rather than antibiotics.
- Preventive (prophylactic) antibiotics in selected children with recurrent UTIs, under specialist advice.
- The NHS pathway, which provides testing, treatment and the recommended imaging.
Before you decide
Use this as a shared-decision checklist. The aim is not just “can this be done?”, but whether it is right for you, now, with the risks and alternatives clearly understood.
What matters most to me?
Think about symptoms, daily life, work, caring responsibilities, sport, fertility, travel, appearance and anxiety — the right choice depends on your priorities, not just the medical facts.
What are all my options?
Ask about waiting, monitoring, medicines, rehabilitation, a smaller or larger procedure, a different test, NHS referral, or a second opinion where that would help.
What would make me pause?
Active infection, pregnancy, unstable medical problems, smoking, medicines that increase bleeding, poor support at home, or feeling pressured are all reasons to slow down and get tailored advice.
What happens if I do nothing today?
For some problems, waiting is safe; for others, delay can make treatment harder. A good consultation should explain the trade-off in plain English.
Benefits
- Proper testing confirms whether it really is a UTI, so the right children are treated and others are not given antibiotics needlessly.
- Effective antibiotics clear the infection and relieve symptoms.
- Identifying and treating a kidney infection promptly reduces the risk of complications.
- Scans in the right children pick up underlying problems (such as reflux or a structural difference) that can be managed to protect the kidneys.
- A clear plan helps prevent further infections and reduces repeated illness.
- Reassurance for families when the urinary tract is normal.
Risks & complications
- Antibiotics can cause side effects such as tummy upset, diarrhoea or a rash.
- Collecting a clean urine sample from a young child can be difficult and may need repeating.
- A dipstick is not perfect, so a culture is often needed to be sure, which takes a couple of days.
- A UTI that does not respond to the first antibiotic and needs changing once the culture is back.
- Over-diagnosis if a UTI is assumed without a proper test, leading to unnecessary antibiotics.
- The need for scans, which means further appointments and, for some scans, an injection or catheter.
- A kidney infection causing the child to become seriously unwell or develop sepsis, needing hospital care.
- An underlying problem (such as significant reflux or a structural abnormality) found on scans, needing specialist management.
- Kidney scarring from repeated or severe infections, which is part of why recurrent and atypical UTIs are investigated.
The two key issues are getting the diagnosis right and not missing the children who need scans. A UTI should be confirmed with urine testing wherever possible, rather than assumed, and antibiotics for bacteria in the urine without symptoms are usually not needed. In babies, and where infections are atypical or recurrent, imaging is recommended to protect the kidneys — ask whether your child needs it and why.
Published figures to discuss
UTIs are common in childhood, and most clear up without lasting harm. The chance of finding an underlying problem, or of kidney scarring, is higher in babies and in atypical or recurrent UTIs, which is why imaging is targeted at those groups. Exact rates vary by age, sex and the type of infection, and Vuemedics does not invent figures; your clinician can give figures relevant to your child.
| Figure | Reported range | How to interpret it | Source / confidence |
|---|---|---|---|
| Atypical or recurrent UTI | Clinically important subgroup | Very young age, severe illness, poor urine flow, non-E. coli infection or repeated UTIs may need imaging or specialist review. | NICE NG224 — Urinary tract infection in under 16s: diagnosis and managementnice.org.ukSource-linked context |
| Contaminated urine sample | Common practical issue | Collection method matters. A contaminated sample can lead to unnecessary antibiotics or missed diagnosis. | Guide sourcesClinical context |
| Kidney infection or sepsis | Uncommon but urgent | Fever, loin pain, vomiting, rigors, lethargy or poor feeding need prompt assessment. | NICE NG224 — Urinary tract infection in under 16s: diagnosis and managementnice.org.ukSource-linked context |
| Constipation or bladder dysfunction missed | Common contributor to recurrence | Bowel habits, daytime wetting, urgency and toileting routines should be part of the plan. | Guide sourcesClinical context |
These are literature figures, not a personalised prediction. Your own risks and likely benefits depend on your circumstances, your health, and how your care is carried out and followed up.
What happens afterwards
Most children recover from a UTI within a few days of starting the right antibiotic. 'Afterwards' also covers any scans that are arranged and steps to prevent further infections.
- Symptoms easing within a day or two of the right antibiotic.
- Waiting a couple of days for the culture result.
- Some children needing scans afterwards, depending on age and how typical the infection was.
- Being advised on drinking enough, good toileting habits and managing constipation to reduce future UTIs.
Aftercare
- Give the full antibiotic course as prescribed, even once your child feels better.
- Encourage plenty of drinks and regular, unhurried toilet trips.
- Treat and prevent constipation, which can contribute to UTIs, with advice from your clinician.
- Attend any scans that are arranged, and ask what they are for.
- Watch for the infection coming back, and keep a note if UTIs recur.
- Seek advice if symptoms do not improve within a couple of days, or your child becomes more unwell.
- Ask whether preventive steps are needed if your child has had repeated infections.
- Keep follow-up appointments and any specialist referrals.
- The full antibiotic course, with clear instructions
- A plan for plenty of drinks and good toileting habits
- Advice on managing constipation if relevant
- Dates for any ultrasound or other scans
- A note of symptoms in case UTIs recur
- Knowing when to seek urgent help if your child worsens
- Details of any follow-up or specialist referral
⚠ Get urgent help if…
- A baby or young child with a high fever who is floppy, very sleepy, not feeding, or seems seriously unwell — seek urgent help; call 999 if very unwell.
- A rash that does NOT fade when pressed with the side of a clear glass — call 999 (possible meningococcal sepsis).
- Fast or laboured breathing, cold hands and feet, or mottled skin in an unwell child — call 999.
- A high fever with back or side pain, repeated vomiting, or your child becoming more unwell despite antibiotics — seek urgent advice (possible kidney infection).
- No improvement within about 48 hours of starting antibiotics — go back for review.
- Blood in the urine, or being unable to pass urine — seek medical advice.
- Signs of dehydration: very few wet nappies, dry mouth, drowsiness — seek help.
Who to contact: your clinician, clinic or test provider first (keep their number to hand). For urgent advice when you can't reach them, call NHS 111. In an emergency, call 999.
General guidance — it doesn't replace the specific advice your specialist gives you.
Results & realistic expectations
A good result is symptoms settling within a day or two of the right antibiotic, a urine culture confirming the infection has been treated appropriately, and — where scans are done — a urinary tract that looks normal. For most children, a UTI is a one-off that clears up fully.
A single normal urine test or scan does not promise a child will never get another UTI, and a UTI in a baby or an unusual or recurrent UTI is taken seriously precisely because a minority of children have an underlying cause. The point of proper testing and the right scans is to find and manage those few children while reassuring the many for whom all is well.
Most childhood UTIs are one-off infections that clear completely. Some children get repeated UTIs, especially around toilet training or with constipation, and these warrant assessment and preventive measures. Where scans show an underlying difference such as reflux, this is followed and managed over time, often improving as the child grows; your team will advise on monitoring and when treatment can ease off.
Related tests, treatments or support
Managing a UTI often goes alongside addressing contributing factors — particularly constipation and toileting habits, which are common and treatable. Where infections recur or are atypical, it is combined with imaging (ultrasound, and sometimes DMSA or MCUG scans) and, for some children, a specialist (paediatric or kidney) opinion and preventive antibiotics in selected cases.
Follow-up & long-term care
Follow-up depends on the child. A straightforward first UTI in an older child that clears up may need no scans and no specific follow-up beyond advice. Babies, and children with atypical or recurrent UTIs, are followed up for the results of scans and any specialist input. You should always be able to return if symptoms recur or your child does not improve.
- Encourage good fluid intake and regular, complete bladder emptying.
- Prevent and treat constipation, a common contributor to UTIs.
- Watch for and act early on recurrent symptoms.
- Attend any planned scans and specialist follow-up.
- Follow any agreed preventive plan, such as low-dose preventive antibiotics in selected children.
- Keep a simple record if your child has repeated infections.
Repeat, follow-on and what comes next
- Antibiotics may need changing once the urine culture identifies the germ and its sensitivities.
- A urine sample sometimes has to be repeated if it was difficult to collect cleanly.
- Some children need more than one type of scan, depending on age and findings.
- Recurrent UTIs may lead to a change of plan, including specialist referral and preventive measures.
Ask what happens if the result is unclear or needs repeating, and what is included if further tests or follow-up are needed.
What good aftercare looks like
- Confirmation of the diagnosis with urine testing and a clear antibiotic plan.
- Clear advice on finishing the course, fluids, toileting and managing constipation.
- The right imaging arranged for babies and for atypical or recurrent UTIs, with an explanation of why.
- A clear plan for what to do if the child does not improve or the infection recurs.
- Follow-up of scan results and specialist referral where needed.
What affects the cost
Costs vary a great deal between people and providers, and we don't publish prices. What matters is understanding what drives the cost and making sure your quote is complete. The main things that affect it:
- The clinic appointment and urine testing (dipstick and laboratory culture).
- Antibiotics and any repeat appointments if treatment needs changing.
- Whether scans (ultrasound, DMSA, MCUG) are needed and who reports them.
- Specialist (paediatric or kidney) input for atypical or recurrent UTIs.
- Assessment and treatment of contributing factors such as constipation.
- Follow-up appointments and any preventive treatment.
- The appointment fee and the cost of urine testing (dipstick and culture).
- The cost of any scans recommended and who interprets them.
- Whether a specialist opinion is included if the UTI is recurrent or atypical.
- How antibiotics and any treatment changes are arranged and charged.
- Follow-up fees and how to get advice if your child does not improve.
- What happens, and what it costs, if the infection recurs or an underlying problem is found.
On the NHS? UTIs in children are commonly diagnosed and treated on the NHS, including the scans recommended for babies and for atypical or recurrent infections; private care is sometimes used for a quicker appointment or for recurrent-UTI assessment.
You're entitled to your total cost in writing — including reports, follow-up and what happens if the result is inconclusive — before you decide.
Consent traps and marketing red flags
These are not small details. They are often where patients lose choice, time to reflect, or realistic expectations.
Consent traps
- Being given antibiotics for a 'UTI' that was never confirmed with a urine test.
- Not being told whether scans are recommended for your child's age and situation, or why.
- Treating bacteria in the urine without symptoms unnecessarily.
- No clear advice on what to do if the child does not improve in 48 hours.
- Contributing factors such as constipation not being addressed.
Marketing red flags
- Prescribing antibiotics for presumed UTIs without proper urine testing.
- Ordering lots of scans routinely for every UTI, beyond what guidance supports.
- Promising to 'cure' recurrent UTIs without assessing the underlying cause.
- Selling supplements or tests with no evidence as a way to prevent UTIs.
Choosing a specialist safely
- Check the specialist is on the GMC Specialist Register for this area.
- Make sure they work at a CQC-registered service, and look for membership of the relevant Royal College or professional body.
- You're entitled to time to consider and to have your questions answered before you agree — the specialist who looks after you should explain it, not a salesperson.
- Be wary of pressure: time-limited offers or deposits taken before you've had time to think are red flags, not bargains.
- You're entitled to your total cost in writing — including any follow-up — before you decide.
Questions to ask your medical professional
Take this to your consultation. A good specialist will welcome every one of these.
- Has the UTI been confirmed with a urine test, and do we have the culture result?
- Is this a bladder or a kidney infection, and does that change the treatment?
- Which antibiotic, for how long, and what side effects should I watch for?
- Does my child need any scans, given their age and how the infection behaved?
- Could constipation or toileting habits be contributing, and how do we tackle that?
- What should I do if symptoms do not improve in 48 hours or keep coming back?
- Do we need a specialist referral or any preventive treatment?
- Are you on the GMC Specialist Register for this area, and which Royal College or professional body are you a member of?
- Will you be the specialist who carries out my treatment, and who looks after me afterwards?
- What are the risks for someone like me, and how often do your own patients have a problem or need it repeated or redone?
- What does a realistic result look like — and what can this treatment not achieve?
- What are my options, including waiting, doing nothing for now, or choosing a different approach?
- Can I have written information, results and aftercare instructions in a format I can use, including any accessibility or communication support I need?
- What is the total cost in writing, including any follow-ups, and how much time do I have to decide?
Frequently asked questions
Does my child really need a urine test, or can the doctor just treat it?
Will my child need a scan?
How long do antibiotics take to work?
Can a UTI harm my child's kidneys?
Why do UTIs keep coming back?
Can we get this managed on the NHS?
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How we made this page
Medically reviewed by a GMC-registered consultant. Written in plain English, checked against NHS, NICE, GMC and relevant Royal College / specialist-society guidance, and kept under review. No clinic paid to appear on this page, and we publish no pricing. This is general information to help you prepare — it is not a substitute for advice from your own clinician. How we review our guides →
Source hierarchy: UK regulator and NHS/NICE guidance first, then relevant Royal College or specialist-society guidance, then peer-reviewed evidence for procedure-specific figures where available.
Sources & standards: NICE NG224 — Urinary tract infection in under 16s: diagnosis and management NHS — Urinary tract infections (UTIs) in children Healthier Together — Urinary tract infection (UTI) in children RCPCH — Resources for children, young people and families Meningitis Now — The glass test for a non-blanching rash
Reviews reflect patients' experience of care, not clinical outcomes. For procedure volumes and outcome data see PHIN.
Last medically reviewed 2026-09-21. Spotted something wrong or out of date? Report an error in this guide.
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