Pediatric UTI

Overview

A urinary tract infection, or UTI, is an infection in any part of the system that makes and removes urine from the body. This includes the kidneys, ureters, bladder, and urethra. In children, UTIs are usually caused by bacteria that enter the urinary tract and multiply, causing inflammation and infection.

Yes, urinary tract infections are quite common in children. About 1 in 10 girls and 1 in 30 boys will have at least one UTI by age 16.

UTIs can affect children of any age, but they are most common in girls and in children under the age of 2. Uncircumcised boys also have a slightly higher risk.

Symptoms

Common symptoms

• Pain or burning when urinating
• Frequent urination (needing to go often, but only passing a small amount)
• Foul-smelling or cloudy urine
• Blood in the urine (pink or red color)
• Fever (temperature over 38°C/100.4°F)
• Pain in the lower belly or back

Symptoms in children

• In babies and young children, symptoms can be vague: fever, fussiness, poor feeding, vomiting, or diarrhea.
• Older children may complain of pain in the side or lower back, or say it hurts to pee.
• Bedwetting (enuresis) in a child who was previously dry at night can also be a sign.

Causes

Main causes

• Bacteria (most often E. coli from the bowel) entering the urethra and traveling up into the bladder.
• In children, poor toilet hygiene (wiping from back to front) can introduce bacteria into the urethra.
• Holding urine for too long (infrequent voiding) allows bacteria to grow.
• Constipation can also press on the bladder and prevent it from emptying fully, raising the risk of infection.

Risk factors

• Being a girl (shorter urethra makes it easier for bacteria to reach the bladder)
• Being under age 2
• Not being circumcised (in boys)
• Having a history of UTIs
• Using bubble baths or harsh soaps that irritate the urethra
• Having a catheter (a tube to drain urine)
• Structural problems in the urinary tract (like vesicoureteral reflux, where urine flows backward toward the kidneys)

When to see a doctor

See a doctor urgently if:

• If your child has a fever and you suspect a UTI, especially if the baby is younger than 3 months.
• If your child has visible blood in the urine.
• If your child has severe pain or vomiting and cannot keep fluids down.

Book a routine appointment if:

• If your child complains of pain or burning when peeing for more than a day.
• If you notice foul-smelling or cloudy urine that does not go away.
• If your child starts wetting the bed after being dry for several months.

Diagnosis

A doctor will ask about your child's symptoms and examine them. The main way to confirm a UTI is by testing a urine sample. In young children, a clean catch urine sample may be collected using a special bag or a catheter to avoid contamination.

Tests that may be done

• Urine dipstick test: A quick test that checks for signs of infection like nitrites or white blood cells.
• Urine culture: A lab test that grows the bacteria to confirm the infection and identify which antibiotic will work best.
• Ultrasound: Sometimes used to look at the kidneys and bladder, especially if your child has recurrent UTIs or an unusual anatomy.

What to expect at your appointment

The doctor will explain the results of the urine test. If the dipstick suggests a UTI, they may prescribe antibiotics right away, or wait a day or two for the culture results. The urine culture is the gold standard. Your child might need another urine test after treatment to make sure the infection is gone, especially if symptoms persist.

Treatment

UTIs are treated with antibiotics to kill the bacteria. It is very important to give the full course of antibiotics exactly as prescribed, even if your child feels better after a few days. This helps prevent the infection from coming back or getting worse.

Self-care at home

• Encourage your child to drink plenty of water to help flush out the bacteria.
• Make sure your child empties their bladder fully each time they use the toilet.
• Avoid bubble baths, harsh soaps, and perfumed wipes in the genital area.
• Wipe girls from front to back after using the toilet.
• Give your child pain relief (acetaminophen or ibuprofen) for fever or discomfort — ask your doctor or pharmacist for the right dose for your child's age and weight.

Medical treatments

The main treatment is a course of antibiotics. The doctor will choose an antibiotic based on the type of bacteria and your child's age and allergy history. Antibiotics are usually given by mouth (liquid or tablets) for 3 to 7 days. In some cases, if the infection is severe or if your child cannot keep medicine down, they may need antibiotics through a vein (IV) in the hospital.

When is surgery considered?

Surgery is rarely needed for a UTI itself. However, if your child has a structural problem such as severe vesicoureteral reflux (backflow of urine to the kidneys) that leads to repeated kidney infections, a doctor may recommend a minor surgery to correct the problem. This is only considered after thorough evaluation by a specialist.

Living with this condition

Most children with a UTI recover fully within a few days of starting treatment. Encourage good toileting habits and plenty of fluids. Watch for signs of a recurrence, and contact your doctor if symptoms come back.

Lifestyle tips

• Establish a regular bathroom schedule (every 2–3 hours during the day).
• Teach your child to wipe properly (front to back for girls).
• Avoid constipation by offering a diet rich in fiber (fruits, vegetables, whole grains).
• Encourage your child to drink enough water throughout the day.

Diet and exercise

No special diet is needed for a UTI, but staying hydrated is important. Regular physical activity is fine as long as your child feels well. If they have a fever, rest is more important.

Mental health and emotional wellbeing

Recurrent UTIs can be frustrating and stressful for both the child and the family. Children may feel embarrassed or anxious about bathroom habits or pain. Reassure your child that this is a common illness and that treatment works. Open communication with your child's doctor can help manage concerns.

Prevention

Many UTIs can be prevented with good hygiene and toileting habits. Drinking enough fluids and emptying the bladder regularly are key. For some children, a low-dose antibiotic taken every day (prophylaxis) may be recommended by a specialist to prevent recurrent infections, but this is not common practice anymore because of concerns about antibiotic resistance.

Complications

If left untreated

• Kidney infection (pyelonephritis) – this is a more serious infection that can cause high fever, chills, and back pain.
• Kidney damage – repeated or severe kidney infections can lead to scarring of the kidneys, which may affect kidney function long-term.
• Sepsis – a life-threatening infection that spreads through the bloodstream (very rare in children with a normal immune system).

Long-term outlook

With prompt treatment, almost all children recover from a UTI without any lasting problems. Even if a kidney infection occurs, most children get better with antibiotics and do not have permanent damage. The key is to see a doctor early and follow the treatment plan. For children who have recurrent UTIs, a specialist can help find the cause and reduce future infections.

Find support

External links open third-party websites. Ruqelo Health is not responsible for external content. Listing an organisation does not imply endorsement.