UTI in children

Overview

A urinary tract infection (UTI) is an infection in the urinary system — the kidneys, bladder, or the tubes that carry urine. In children, UTIs are usually caused by germs that get into the tube where urine leaves the body and travel up into the bladder. These infections can cause pain and fever, and need treatment to keep them from becoming more serious.

Yes. UTIs are one of the most common bacterial infections in children. About 1 in 20 girls and 1 in 100 boys will have a UTI by age 10.

Children of any age can get a UTI, but they are most common in infants and toddlers. Girls are more likely to get a UTI than boys, except during the first year of life, when boys have a higher risk.

Symptoms

Common symptoms

• Pain or burning when peeing
• Needing to pee often
• A sudden strong urge to pee
• Pain in the lower belly or back
• Cloudy, dark, or strong-smelling urine
• Blood in the urine

Symptoms in children

• Fever, sometimes without any other obvious sign
• Fussiness or irritability
• Poor feeding or vomiting
• Diarrhea
• Unusual-smelling urine
• Wetting themselves or bedwetting, even if they already stay dry
• Crying when peeing

Symptoms in older adults

• For older adults, a UTI may cause confusion, agitation, or falls, but this article focuses on children.

Causes

Main causes

• Bacteria from the bowel area that enter the urethra and travel up into the bladder
• Not emptying the bladder fully
• Constipation, which can put pressure on the bladder
• Wiping from back to front (in girls), which can spread germs
• Structural problems in the urinary tract that make it easier for germs to climb up

Risk factors

• Being a girl
• Being an uncircumcised boy, especially in the first year of life
• Family history of UTIs
• Constipation
• Holding urine for long periods
• Using bubble baths or harsh soaps that irritate the urinary opening
• Having a urinary catheter or tube
• Having vesicoureteral reflux, a condition where urine flows backward from the bladder toward the kidneys

When to see a doctor

See a doctor urgently if:

• If you suspect a UTI in your child, call your doctor or nurse line within 24 hours.
• For a baby under 3 months with a fever, see a doctor immediately.
• If your child has back pain, vomiting, or looks very ill, get care the same day.

Book a routine appointment if:

• If your child has mild symptoms like burning or frequent peeing, make a regular appointment to be checked.

Diagnosis

To diagnose a UTI, the doctor will ask about symptoms, examine your child, and test a urine sample. For older children, a 'clean catch' urine sample is collected. For infants or young children, a small plastic bag or a thin tube (catheter) may be used to get a clean sample.

Tests that may be done

• A urine dipstick test, which uses a strip to quickly check for signs of infection
• A urine culture, which grows the germs in a lab to identify exactly what is causing the infection
• Sometimes a blood test or an ultrasound of the kidneys and bladder, if the infection is severe or keeps coming back

What to expect at your appointment

The doctor may start treatment before the culture results come back. If your child is very young or very unwell, they may need to be in the hospital for a day or two. Most children begin to feel better within 48 hours of starting treatment. After treatment, the doctor may ask for another urine sample to make sure the infection is gone.

Treatment

UTIs in children are treated with antibiotics — medicines that kill the bacteria. The exact antibiotic and how long it is given depend on the child's age, the type of infection, and local antibiotic resistance patterns. Your healthcare provider will choose the right treatment. It is important to finish the entire course, even if your child feels better before it is done.

Self-care at home

• Encourage your child to drink extra fluids, like water or milk, to help flush the germs out of the urinary tract.
• Make sure your child rests and gets plenty of sleep.
• Give pain relief only if recommended by your child's doctor — never give adult medicines to a child.
• Follow your doctor's advice about warm baths or gentle cleaning to ease discomfort.

Medical treatments

A UTI is treated with antibiotics prescribed by a doctor. The medicine is usually given by mouth as a liquid or tablet. For very young infants, or for severe infections, antibiotics may need to be given through an IV line in the hospital. A follow-up urine test may be needed to confirm the infection has fully cleared.

When is surgery considered?

Surgery is not needed for a simple UTI. If a child has a structural problem in the urinary system or severe kidney reflux, a specialist may recommend a procedure, but this is rare and only after careful evaluation.

Living with this condition

Most children recover fully from a UTI with no lasting effects. While your child is treated, watch for improvement and offer plenty of fluids. If fever lasts more than 48 hours after starting treatment, or if your child seems to be getting worse, contact your doctor. Some children may need a repeat urine test to ensure the infection is gone.

Lifestyle tips

• Encourage regular bathroom breaks throughout the day, especially at school.
• Teach your child to empty their bladder fully and not to hold urine.
• For girls, teach wiping from front to back after using the toilet.
• Avoid bubble baths and harsh soaps in the bath.
• Make sure your child changes underwear daily and wears loose, breathable clothing.

Diet and exercise

There is no special diet to cure a UTI, but drinking plenty of fluids is very important. Water is best because it helps dilute urine and flush out germs. Eating high-fiber foods like fruits, vegetables, and whole grains can help prevent constipation, which can increase UTI risk. Normal physical activity and play are fine, as long as your child feels well enough.

Mental health and emotional wellbeing

A UTI can be uncomfortable and stressful for a child, and parents may worry about repeat infections. Try to stay calm and supportive. Reassure your child that the treatment will help and that most children get better quickly. If your child is anxious, talk to them in simple, gentle words and answer their questions with comfort.

Prevention

You can reduce the risk of UTIs in children by encouraging good bathroom habits, keeping your child hydrated, treating constipation, and avoiding irritants like bubble baths. Some children who get repeated UTIs may need to see a specialist for extra care, but most everyday prevention is about simple routines.

Vaccines

There is no vaccine that specifically prevents UTIs. Keeping your child up to date on routine immunizations is good for overall health, but it will not stop UTIs. Good hygiene and bathroom habits are the best prevention.

Screening programmes

There is no routine screening test for UTIs in children. Testing is done when symptoms suggest an infection, or sometimes for children who have had repeated UTIs or known urinary tract problems.

Complications

If left untreated

• If a UTI is not treated, the infection may spread upward to the kidneys, causing a kidney infection.
• A kidney infection can cause high fever, back pain, and vomiting, and may require hospital care.
• Repeated or severe kidney infections can cause kidney scarring or permanent damage over time.
• In very serious cases, the infection can enter the bloodstream and become life-threatening.

Long-term outlook

The good news is that most childhood UTIs are easily treated and cause no lasting problems. With the right medicine and plenty of fluids, your child should start to feel better within a day or two. After finishing the full course of antibiotics, the infection usually clears completely. If UTIs keep happening, a doctor can help find the reason and create a plan to protect your child's health.

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