About this condition
Pyelonephritis is an infection affecting the upper urinary tract, including the kidney. Fever, flank pain or an unwell child may require prompt assessment; young infants can have non-specific signs such as feeding difficulty or lethargy.
What matters most
The clinician considers the child’s age, fever, urinary symptoms, hydration and general appearance. Pyelonephritis should not be diagnosed solely from back pain, nor dismissed because a small child cannot explain the location of pain.
Symptoms and situations to watch
Possible findings include high temperature, chills, pain in the side or back, abdominal discomfort, nausea, vomiting, urinary urgency or burning. An infant may have fever, vomiting or poor feeding without a clear urinary complaint.
Important distinctions
A lower bladder infection and pyelonephritis are managed differently. Delay in treating a significant kidney infection can be harmful, but one episode does not automatically mean a child has chronic kidney disease.
How clinicians assess the problem
A clinician assesses the child, collects an appropriate urine specimen and considers a urine culture and other tests according to severity. Imaging is selected for age, response to treatment or unusual features; ultrasound is not mandatory in every case.
Care and limitations
Antibiotic treatment is prescribed by a clinician according to the presentation and relevant test results. Some children may need hospital care, especially if unable to drink or severely unwell. Follow the prescribed plan and arranged review rather than treating at home without assessment.
When emergency help is needed
An infant under three months with suspected urinary infection needs immediate paediatric evaluation. Repeated vomiting, inability to drink, marked lethargy, signs of sepsis or altered consciousness are urgent; call 103 or 112 for severe deterioration.
Related information
Urinary tract infections in children; Recurrent urinary tract infections in children; Cystitis in children; Congenital kidney and urinary tract differences in children.
Signs and symptoms
Possible findings include high temperature, chills, pain in the side or back, abdominal discomfort, nausea, vomiting, urinary urgency or burning. An infant may have fever, vomiting or poor feeding without a clear urinary complaint.
Diagnosis and tests
A clinician assesses the child, collects an appropriate urine specimen and considers a urine culture and other tests according to severity. Imaging is selected for age, response to treatment or unusual features; ultrasound is not mandatory in every case.
Care and treatment approaches
Antibiotic treatment is prescribed by a clinician according to the presentation and relevant test results. Some children may need hospital care, especially if unable to drink or severely unwell. Follow the prescribed plan and arranged review rather than treating at home without assessment.
When to seek urgent care
An infant under three months with suspected urinary infection needs immediate paediatric evaluation. Repeated vomiting, inability to drink, marked lethargy, signs of sepsis or altered consciousness are urgent; call 103 or 112 for severe deterioration.
Frequently asked questions
Can pyelonephritis be treated without a doctor?
No. Suspected kidney infection in a child needs prompt clinical assessment and often prescription treatment.
Does every child need ultrasound afterward?
No. Imaging depends on age, complications, response to treatment and other clinical criteria.
Does one episode mean chronic kidney disease?
Not necessarily. A clinician determines the need for kidney-function monitoring and follow-up in the individual child.
Important information
A medical consultation is needed for diagnosis and treatment recommendations.
Self-treatment can be harmful to your health.
