UTIs in Kids: Symptoms Parents Can Easily Miss

UTIs are common in childhood, but they can be easy to miss. In children, the signs don’t always look the way we expect. It is important to treat UTIs in children effectively, so prompt diagnosis can make a difference.  

In this article, you’ll learn how UTI symptoms change with age, why the way a urine sample is collected matters, the link between constipation and repeat UTI infections, and more 

UTI Symptoms in Babies, Toddlers, and Older Kids 

We tend to think UTIs have a clear set of symptoms, but in babies and young children, they can show up in very unexpected ways. 

Potential symptoms of UTIs in babies and toddlers under 2:  

In babies, fever may be the only clue that a urinary tract infection is happening. Among infants with fever, about 7% have a UTI (1). Other signs of UTIs in infants can include poor feeding, vomiting, unusual fussiness or sleepiness, and in young babies, slow weight gain. 

Potential symptoms of UTIs in preschoolers:
Some potential signs of urinary tract infections in preschoolers include accidents after a child has been reliably potty trained, belly pain, squirming or doing the “potty dance,” saying it hurts to pee, or a fever without the classic cold symptoms. 

Potential symptoms of UTIs in school-age kids and teens:
Symptoms of UTIs in older kids usually start to look more like the adult version: burning, urgency, peeing often, and lower belly pain. Fever, pain in the back or side, or vomiting can mean the infection has reached the kidneys, which needs prompt care. 

A few patterns show up at the group level. UTIs are more common in girls than boys overall, while uncircumcised young boys have a higher risk than circumcised boys (1). 

You might like these articles, too:

• Natural Solutions for Bedwetting in Older Children and Teens
• Fevers 101: Benefits, Home Care Strategies, & When to Medicate 

How UTIs Are Diagnosed in Kids 

At the doctor’s office, diagnosing a UTI in a child generally starts with questions about fever, changes in peeing, accidents, and bowel habits, along with a physical exam to rule out other causes of fever. From there, doctors will generally use two urine tests. 

A urinalysis is a quick screening test, often done right in the office with a dipstick or a microscope. It looks for clues of inflammation or infection, such as white blood cells or nitrites, a byproduct some bacteria leave behind. Results come back quickly, but a urinalysis alone doesn’t confirm a UTI. 

A urine culture is the test that identifies whether bacteria grow in the urine and, when appropriate, which antibiotics are likely to work against them. Culture results generally take longer than a urinalysis. Depending on the child’s age, symptoms, and how sick they are, treatment may begin before the final culture results are available and then be adjusted if needed. 

Current AAP guidance defines a UTI using the child’s clinical picture together with evidence of inflammation in the urine and growth of a pathogenic bacterium on a properly collected urine culture (1,8). 

Both these tests depend on an accurate urine sample. More on that below. 

Tips for Collecting an Accurate Urine Sample from Babies and Kids 

When using urine samples to test for UTIs, a clean sample is important. For babies and young children who cannot provide a clean-catch sample, some clinics use a plastic collection bag over the genitals for initial urine screening. The problem is that bag specimens are easily contaminated by bacteria from the skin. Current AAP guidance says a bagged urine specimen should not be used to diagnose a UTI. If a bag urinalysis suggests infection in a child who cannot provide a clean catch, a catheterized specimen should be obtained for culture (8). 

A false-positive urine culture can lead to unnecessary antibiotics, additional testing, and a “history of UTIs” label that follows a child into future doctor visits. 

A clean-catch sample, where urine is caught directly in a sterile cup, is another option for some babies, though waiting for a baby to pee on cue can take a long time. A simple technique called the Quick-Wee method can speed things up by gently rubbing the lower belly with gauze soaked in cold saline. In a trial of 354 infants aged 1 to 11 months, 31% voided within 5 minutes with Quick-Wee compared with 12% with standard care, with no significant difference in contamination (2). Parents can ask whether their child’s clinic uses this method. 

Potty-trained children can usually give a midstream clean-catch sample. Clean the area as instructed, have your child start peeing into the toilet, and then catch the middle part of the stream in the cup. If you collect a sample at home, ask your doctor how quickly it needs to reach the lab and how it should be stored. 

Constipation and Recurrent UTIs: The Bladder-Bowel Connection 

If your child keeps getting UTIs, one of the important things to look at is their bathroom habits. 

Constipation and holding urine can increase UTI risk by preventing the bladder from emptying completely, allowing bacteria more opportunity to multiply. When urinary symptoms and bowel problems occur together, doctors call this bladder and bowel dysfunction (BBD). 

The 2026 AAP guideline identifies BBD, including constipation, as a significant risk factor for recurrent UTIs and recommends evaluating and treating it (1). 

Research shows that UTIs are especially likely to recur in children with both BBD and vesicoureteral reflux (more on this below) (3). Another study found that treating chronic constipation resolved recurrent UTIs in children with otherwise normal urinary tracts (4). 

Signs of constipation parents often miss: 

• Pooping every day doesn’t rule out constipation. Hard, large, or painful stools can still be a sign of constipation. 
• Stools big enough to clog the toilet 
• Streaks or small smears of stool in underwear 
• Recurring belly aches, especially around the belly button 
• Hiding, stiffening, or crossing the legs to avoid pooping 

Signs your child may be holding pee: 

• The “potty dance,” crossing legs, or squatting on a heel 
• Peeing only two or three times a day 
• Sudden, urgent trips to the bathroom or daytime accidents 

If any of this sounds familiar, mention it to your pediatrician. Treating constipation and building better bathroom routines can be an important part of breaking the cycle of repeat infections. 

To learn more about constipation, read these articles:

• Constipation in Infants: What’s Normal, Home Care, and When to Call a Doctor
• Treating Constipation in Kids & Babies with Integrative Medicine 

When It Burns but Isn’t a UTI: Common Mimics in Kids 

Plenty of kids say it hurts to pee and turn out to have a negative urine culture. Here are some of the usual suspects: 

• Skin irritation (vulvitis or vulvovaginitis). In young girls, the skin around the vaginal opening is thin and easily irritated by bubble baths, scented soaps, shampoo in the bath water, wet swimsuits, or tight leggings. Urine can sting irritated skin. This is one reason the classic “no bubble baths” advice exists. 
• Pinworms. Intense itching around the bottom, often worse at night, can spread forward and contribute to irritation and burning. 
• Labial adhesions. In babies and young girls, the inner labia can stick together, sometimes trapping urine and causing dribbling or irritation. 
• Irritation at the tip of the penis. In boys, redness or soreness at the opening can make peeing sting. 
• Constipation and holding. A full bowel and an overstretched bladder can cause urgency, frequency, and discomfort without an infection. 

This is another reason a properly collected urine culture matters. Treating irritation with antibiotics won’t fix the actual problem. 

How UTIs Are Treated in Children 

Most symptomatic UTIs in children are treated with antibiotics, and both starting treatment appropriately and choosing the right duration matter. 

Do UTIs in Kids Always Need Antibiotics? 

A symptomatic, confirmed UTI in a child generally needs antibiotics. Bacteria in the bladder can travel up toward the kidneys, and antibiotics are the standard treatment used to clear the infection. 

There is one important exception. Sometimes bacteria show up in a child’s urine without urinary symptoms or signs of inflammation, which doctors call asymptomatic bacteriuria. This is one reason current diagnostic criteria include evidence of inflammation in the urine, rather than diagnosing a UTI based on bacterial growth alone (1,8). Asymptomatic bacteriuria generally isn’t treated with antibiotics. 

You might like these articles, too:

• When Antibiotics Are Needed & How to Care for Your Microbiome
• How to Avoid Side Effects of Antibiotics Using Natural Medicine 

Why Prompt Treatment Matters for UTIs With Fever 

Starting antibiotics promptly helps protect a child’s kidneys when a UTI comes with a fever. A fever with a UTI can be a sign that the infection has reached the kidneys. That infection causes inflammation, and when the inflamed area heals, it can sometimes leave behind scar tissue. 

Most kidney scars are small and never cause problems, but more extensive scarring can increase the risk of complications such as high blood pressure or reduced kidney function later in life. 

In a study of 482 children with fever and a UTI, children who developed new kidney scarring had a median of 72 hours of fever before starting antibiotics, compared with 48 hours in children without new scarring (5). Longer delays before treatment were associated with a higher risk of renal scarring. 

How Long Should My Child Take Antibiotics for a UTI? 

New AAP guidance supports shorter antibiotic courses for many children with uncomplicated UTIs. Recommended treatment durations generally depend on age and infection severity (1): 

• Ages 2–5, uncomplicated bladder infection without fever: 3–5 days. 
• Ages 2–24 months, or ages 2–5 with suspected kidney infection: 5–7 days. 
• Higher risk cases: 7–14 days may be needed. 

The SCOUT trial, involving children ages 2 months to 10 years who were improving after 5 days of antibiotics, also supported shorter courses, although treatment failure was slightly higher with 5 versus 10 days (4.2% vs. 0.6%) (6). 

Your child’s pediatrician will determine the appropriate antibiotic and treatment duration based on their individual needs. 

You might like this article, too: A Nutritional Approach to Restore Gut Health After Food Poisoning or Stomach Virus 

Tips for Parents During UTI Treatment 

A few simple steps can help your child’s UTI treatment go smoothly: 

• Finish the full course of antibiotics, even if your child feels better in a day or two. 
• Ask the office to call you when the culture results come back, since the culture shows which antibiotics the bacteria respond to, and the prescription sometimes needs to change. 
• Call your pediatrician if the fever hasn’t improved after 48 hours of antibiotics. 

Recurrent UTIs, Vesicoureteral Reflux, and Daily Preventive Antibiotics 

When UTIs keep coming back, doctors may investigate urinary reflux and consider preventive antibiotics. 

What is Vesicoureteral Reflux (VUR)?  

VUR occurs when urine flows backward from the bladder toward the kidneys, increasing the risk of kidney infections. 

The 2026 AAP guideline recommends a kidney and bladder ultrasound after a first UTI with fever in children under 5. A more invasive test (VCUG) is generally unnecessary if the ultrasound is normal, unless other concerns arise (1). 

Are daily preventive antibiotics necessary?  

The RIVUR trial, involving approximately 600 children with VUR, found that daily antibiotics reduced recurrent UTIs from 24% to 13%. However, they did not significantly reduce kidney scarring and increased the likelihood of antibiotic-resistant infections (7). 

Children with febrile UTIs or bladder and bowel dysfunction appeared to benefit most (7). 

If your pediatrician recommends preventive antibiotics, consider asking about treatment duration, addressing constipation or bladder habits, specialist referrals, recurrence prevention, and supporting gut health. 

How to Prevent UTIs in Kids: Bathroom Habits that Make a Difference 

For many kids, simple bathroom habits can help reduce the risk of recurring UTIs. 

• Improve toilet posture. Use a footstool for support, keep knees comfortably apart, and lean forward slightly to encourage complete emptying. Girls should sit fully rather than hover. 
• Stick to a bathroom schedule. Encourage peeing every 2–3 hours, especially for kids who tend to hold it. 
• Try double voiding. After peeing, have your child relax, wait a few seconds, and try again to help empty the bladder. 
• Stay hydrated. Encourage regular water intake, aiming for pale yellow urine. 
• Support regular bowel movements. Encourage toilet time after meals, fiber-rich foods, fluids, and daily movement to prevent constipation. 
• Avoid irritation. Wipe front to back, skip bubble baths and scented soaps, rinse sensitive areas with water, and choose breathable underwear. Change out of wet swimsuits promptly. 

You might like this article, too: Is Your School-Age Child Drinking Enough Water? 

Cranberry and D-Mannose for Kids: What Parents Should Know 

Parents often ask about cranberry and D-mannose, two popular natural options that may support urinary health, and whether they make sense for children. 

Cranberry comes in juice, dried fruit, and supplement forms. If you offer cranberry juice, check the label, since many juice “cocktails” carry a lot of added sugar. 

D-mannose is a simple sugar found naturally in fruits like cranberries, apples, and peaches. Many adults use D-mannose supplements as part of their urinary health routine. Most D-mannose products are formulated and dosed for adults, and there’s no established dose for young children. 

If you’re curious about cranberry or D-mannose for your child, talk with your pediatrician first. Neither should ever replace testing and treatment for an active infection or a fever. 

To learn more, read this article: The Role of D-Mannose in Promoting Urinary Health 

When to Call the Doctor About a Possible UTI 

Most UTIs clear up well with prompt treatment, but some signs mean you should call right away or seek same-day care. 

• Any fever of 38°C (100.4°F) or higher in a baby under 3 months 
• A fever with no clear cause in a baby or toddler, especially if it lasts more than a day 
• Pain in the back or side, vomiting, or trouble keeping fluids or medicine down 
• Unusual sleepiness, fewer wet diapers, or other signs of dehydration 
• Blood in the urine 
• A fever that hasn’t improved after 48 hours on antibiotics 
• A second UTI, or a first UTI in a child who also has constipation or daytime accidents 

You know your child best. If something feels off, trust that and make the call. 

Summary 

Urinary tract infections (UTIs) are common in children, but UTI symptoms in kids often look different from the classic burning and urgency adults know. In babies and toddlers, an unexplained fever may be the only sign, while older children may have new accidents, belly pain, urgency, or pain when peeing. 

Doctors diagnose UTIs by looking at the child’s symptoms together with the urinalysis and a properly collected urine culture. Parents should know that how the urine sample is collected matters, since contaminated samples can lead to inaccurate results. 

A symptomatic, confirmed UTI generally needs antibiotics. Newer guidance supports shorter antibiotic courses for many uncomplicated UTIs, while longer treatment may still be needed for very young infants or higher-risk infections. 

For kids with recurrent UTIs, bathroom habits are often an important piece of the puzzle. Treating constipation, avoiding prolonged urine holding, scheduling regular bathroom breaks, and improving toilet posture can all help support bladder and bowel health. 

References 

1. Alverson, B. K., Hains, D. S., Downs, S. M., El Feghaly, R. E., Forster, C. S., Jain, S., Johnston, A., Mattoo, T. K., Nelson, C. P., Olakanpo, O., Otero, H. J., Peters, C. A., Poppinga, N. M., Saha, D., Schroeder, A. R., Senerth, E., Pilcher, L., Flinn, S. K., Morgan, R. L., & Mustafa, R. A. (2026). Clinical Practice Guideline for the Diagnosis and Treatment of Urinary Tract Infection in Children From 8 Days to 5 Years of Age. Pediatrics, 158(4). https://doi.org/10.1542/peds.2026-078565 
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3. Shaikh N, Hoberman A, Keren R, Gotman N, Docimo SG, Mathews R, Bhatnagar S, Ivanova A, Mattoo TK, Moxey-Mims M, Carpenter MA, Pohl HG, Greenfield S. Recurrent Urinary Tract Infections in Children With Bladder and Bowel Dysfunction. Pediatrics. 2016 Jan;137(1):e20152982. doi: 10.1542/peds.2015-2982. Epub 2015 Dec 8. PMID: 26647376; PMCID: PMC4702025. 
4. Loening-Baucke V. Urinary incontinence and urinary tract infection and their resolution with treatment of chronic constipation of childhood. Pediatrics. 1997 Aug;100(2 Pt 1):228-32. doi: 10.1542/peds.100.2.228. PMID: 9240804. 
5. Shaikh N, Mattoo TK, Keren R, Ivanova A, Cui G, Moxey-Mims M, Majd M, Ziessman HA, Hoberman A. Early Antibiotic Treatment for Pediatric Febrile Urinary Tract Infection and Renal Scarring. JAMA Pediatr. 2016 Sep 1;170(9):848-54. doi: 10.1001/jamapediatrics.2016.1181. PMID: 27455161. 
6. Zaoutis T, Shaikh N, Fisher BT, Coffin SE, Bhatnagar S, Downes KJ, Gerber JS, Shope TR, Martin JM, Muniz GB, Green M, Nagg JP, Myers SR, Mistry RD, O’Connor S, Faig W, Black S, Rowley E, Liston K, Hoberman A. Short-Course Therapy for Urinary Tract Infections in Children: The SCOUT Randomized Clinical Trial. JAMA Pediatr. 2023 Aug 1;177(8):782-789. doi: 10.1001/jamapediatrics.2023.1979. Erratum in: JAMA Pediatr. 2024 Jun 1;178(6):630. doi: 10.1001/jamapediatrics.2024.0973. PMID: 37358858; PMCID: PMC10294016. 
7. RIVUR Trial Investigators; Hoberman A, Greenfield SP, Mattoo TK, Keren R, Mathews R, Pohl HG, Kropp BP, Skoog SJ, Nelson CP, Moxey-Mims M, Chesney RW, Carpenter MA. Antimicrobial prophylaxis for children with vesicoureteral reflux. N Engl J Med. 2014 Jun 19;370(25):2367-76. doi: 10.1056/NEJMoa1401811. Epub 2014 May 4. PMID: 24795142; PMCID: PMC4137319. 
8. Forster CS, Nelson C, El Feghaly R, Hains DS, Nazzal J, Senerth E, Mustafa RA, Morgan RL, Alverson B; AAP Guideline Panel on Diagnosis and Management of UTI. Urinary Tract Infection Diagnosis-A Companion to the American Academy of Pediatrics’ 2026 Clinical Practice Guideline on the Diagnosis and Management of Urinary Tract Infection: Technical Report. Pediatrics. 2026 Oct 1;158(4):e2026078566. doi: 10.1542/peds.2026-078566. PMID: 42803592.