One UTI in a child is worrying enough. But when it keeps coming back — every few months, same fever, same crying, same antibiotics — most parents start asking the question their paediatrician may not have addressed yet: “Is there something wrong with my child’s kidneys or bladder?”
Often, the answer is yes — and it’s treatable.
First — what is a UTI in a child?
A urinary tract infection (UTI) happens when bacteria (usually E. coli from the gut) enter and infect the urinary tract — the bladder (lower UTI) or the kidneys (upper UTI, also called pyelonephritis).
Signs in children vary with age:
In infants and toddlers:
- High, unexplained fever
- Fussiness, poor feeding
- Foul-smelling urine
- Vomiting
In older children:
- Burning or pain when urinating
- Frequent, urgent need to urinate
- Bedwetting after being dry
- Lower abdominal or back pain
A single UTI in a boy of any age, or a UTI with fever in a girl under 2, should always be investigated further. These are red flags that something structural may be wrong.
Why does a UTI keep coming back?
Recurrent UTIs in children — typically defined as 2 or more episodes within 6 months — often indicate an underlying abnormality in the urinary system. The most common causes:
1. Vesicoureteral Reflux (VUR)
The most common finding. Normally, urine flows one way: from kidneys to ureters to bladder and out. In VUR, urine flows backward from the bladder toward the kidneys when the child urinates. This carries bacteria upward, causing recurrent kidney infections (pyelonephritis), which can — over time — scar the kidneys permanently.
VUR affects about 1 in 100 children, but is found in 30–40% of children investigated for febrile UTIs.
2. Pelvi-Ureteric Junction (PUJ) Obstruction
A blockage where the ureter meets the kidney, causing urine to collect and stagnate — a perfect environment for infection. Often detected on prenatal ultrasound but sometimes missed.
3. Posterior Urethral Valves (in boys)
Abnormal tissue folds in the urethra that partially block urine flow. Can cause recurrent UTIs and in severe cases, kidney damage from birth.
4. Bladder dysfunction
Children who hold urine for too long, have constipation, or have an overactive bladder are at higher risk.
What investigations does my child need?
After a confirmed UTI, your doctor should arrange:
- Urine culture — to confirm the infection and identify the bacteria
- Ultrasound of the kidneys and bladder — first-line imaging, checks for structural abnormalities
- MCUG (Micturating Cystourethrogram) — a specialised X-ray to diagnose VUR (recommended after febrile UTI in children under 2, or recurrent UTIs)
- DMSA Scan — a nuclear medicine scan to check for kidney scarring
Many families in Chhattisgarh stop at the ultrasound. This is often not enough. An ultrasound can look normal even when VUR is present.
When does a child with recurrent UTI need surgery?
Not always — but often.
VUR is managed based on its grade (I–V). Low-grade VUR often resolves on its own. High-grade VUR (grades IV–V) or VUR that doesn’t resolve with antibiotic prophylaxis typically needs:
- Endoscopic injection (STING/HIT procedure) — a minimally invasive day procedure where a bulking agent is injected at the ureter opening
- Ureteric reimplantation — surgery to reattach the ureter to the bladder at the correct angle
PUJ obstruction causing symptoms or kidney damage needs surgery — laparoscopic or robotic pyeloplasty — with excellent success rates.
Posterior urethral valves are treated by endoscopic valve ablation — a camera procedure done through the urethra with no cuts.
The kidney scarring problem
This is why acting early matters. Each episode of kidney infection (pyelonephritis) can leave a small scar on the kidney. Multiple scarring episodes can lead to:
- Hypertension (high blood pressure) in childhood or adulthood
- Reduced kidney function
- Rarely, kidney failure in severe cases
Scarring is preventable if the underlying cause is found and treated early.
What should you do?
If your child has had more than one UTI with fever, or any UTI in a boy:
- Ask your paediatrician to refer to a pediatric urologist
- Don’t stop at an ultrasound — ask about MCUG
- Keep a record of all UTI episodes, organisms, and treatment
Early investigation + the right treatment = healthy kidneys for life.
Dr. Tanmay Motiwala is a Pediatric Surgeon and Urologist at Raipur, trained at AIIMS Jodhpur. He evaluates and treats children with recurrent UTIs, VUR, and kidney abnormalities across Raipur, Jagdalpur, Rajnandgaon, and Rajim. Book an appointment: +91 8319084711 or visit drmotiwalapediatricsurgeonraipur.com