nephritis in children
Informed by recognized medical guidance
Overview
Nephritis is swelling and irritation in the kidneys. The kidneys act like filters that clean your child's blood and remove extra water. When they are inflamed, they may not work as well as they should. In children, nephritis can happen suddenly or over a longer time.
Key facts
- Nephritis means the kidneys are inflamed.
- It can happen after an infection or because of a problem with the immune system.
- Early treatment helps protect kidney function and gives the best chance of recovery.
- Many children with nephritis get better and live healthy lives.
Nephritis is not very common in children, but it is a serious condition that needs medical care. When it does happen, it is often treatable.
It can affect babies, older children, and teenagers. Some types affect boys more than girls, and a few types run in families.
Symptoms
- Difficulty breathing or shortness of breath
- Seizures or convulsions
- Confusion or being very hard to wake
- Chest pain
- ⚠High fever
- ⚠Very little urine output or no urine for many hours
- ⚠Severe swelling that makes it hard to move or breathe comfortably
- ⚠Vomiting that won't stop
- ⚠A sudden rise in blood pressure (if you can measure it at home)
Common symptoms
- Swelling in the face, especially around the eyes in the morning
- Swelling in the feet, ankles, legs, or belly
- Urine that looks pink, red, or like cola
- Foamy or bubbly urine
- Peeing less than usual
- High blood pressure
- Feeling very tired
Symptoms in children
- A puffy face in the morning
- Less energy than normal
- Poor appetite
- Rusty or cloudy urine
- Swollen hands or feet
- Needing to pee less often
Symptoms in older adults
- This article focuses on children, but nephritis in older adults is often linked to long-term conditions like diabetes or high blood pressure.
Causes
Main causes
- An infection such as strep throat (the body's immune response may attack the kidneys after the infection)
- Autoimmune conditions like lupus, where the immune system mistakenly attacks the body's own tissues
- Inflammation of the small blood vessels in the kidneys
- Sometimes certain medicines can trigger it, but this is less common in children
Risk factors
- A recent strep throat or skin infection
- Having an autoimmune condition
- Family history of kidney disease
- Some types of nephritis are more common in boys
When to see a doctor
See a doctor urgently if:
- If you see blood in your child's urine
- If your child is swelling more than usual
- If your child is peeing very little
Book a routine appointment if:
- If your child has puffiness, foamy urine, or unusual tiredness that lasts more than a few days
- If your child has high blood pressure found at a check-up
Diagnosis
The doctor will ask about symptoms, do a physical exam, and order tests on urine and blood. If needed, they may refer your child to a kidney specialist (a nephrologist).
Tests that may be done
- Urine test to check for blood, protein, and signs of infection
- Blood test to check how well the kidneys are working
- Kidney ultrasound to take pictures of the kidneys
- Sometimes a small sample of kidney tissue (a biopsy) to find the exact cause
What to expect at your appointment
Most tests are painless or only cause very brief discomfort. A biopsy is done with sedation so your child stays comfortable. The care team will explain results and next steps in a way you can understand.
Treatment
Treatment depends on what caused the nephritis and how active it is. The main goals are to reduce inflammation, control blood pressure, and keep the kidneys working as well as possible.
Self-care at home
- Let your child rest when they feel tired, but let them play when they feel okay
- Follow the doctor's advice about how much fluid to drink
- Use less salt in meals if the doctor recommends it
- Keep a simple record of urine output and weight at home if asked
- Don't give any over-the-counter medicines without checking with the doctor first
Medical treatments
Doctors may prescribe medicines that calm the immune system, reduce inflammation, or lower blood pressure. Some children may need fluids through a vein for a while. Every plan is made specifically for your child's needs. Always talk to the care team before giving any medicine.
When is surgery considered?
Surgery is rarely needed for nephritis. In very severe cases where the kidneys stop working, a specialist team may discuss options like dialysis, which is a machine that cleans the blood.
Living with this condition
With regular check-ups and treatment, most children can go to school, play, and spend time with friends. You'll learn to watch for signs like swelling or tiredness, and the care team will help you know what to do.
Lifestyle tips
- Keep follow-up appointments and take all medicines as prescribed
- Encourage plenty of fluids if the doctor says it's okay
- Help your child wash hands often and avoid contact with people who are sick
- Talk to the school nurse or teachers if your child needs special care or rest
Diet and exercise
Diet depends on your child's blood test results. Some children need lower salt, and a few need limits on certain foods. Exercise is fine once the doctor says it's safe. A dietitian who specializes in kidney care can give practical meal ideas. Ask your care team for a referral.
Mental health and emotional wellbeing
Having a kidney condition can be stressful for both children and parents. It's normal to feel worried, sad, or frustrated at times. Talk to your child's care team about your feelings, and don't be afraid to ask for help from a counselor or psychologist. If you are ever in crisis, call a mental health crisis line or your local emergency number.
Prevention
Not all types of nephritis can be prevented. But treating infections like strep throat quickly and keeping autoimmune conditions under good control may help lower the risk.
Vaccines
Keeping your child up to date on vaccines, including the flu vaccine, can help prevent infections that might trigger kidney problems. Ask your doctor which vaccines your child needs.
Screening programmes
If your child has a family history of kidney disease or an autoimmune condition, regular urine checks may be recommended. Talk to your healthcare provider about a screening plan.
Complications
If left untreated
- Long-term damage to the kidneys
- High blood pressure that doesn't go away
- Kidney failure, which means the kidneys cannot clean the blood well enough
- Fluid building up in the lungs, causing trouble breathing
Long-term outlook
With early and proper care, most children with nephritis improve and can live full, active lives. Some need treatment for months or years, and a small number may need long-term support. Your healthcare team will be with you every step of the way.
Find support
International organisations
Local organisations
- Kidney Care UK ↗ · United Kingdom
External links open third-party websites. Ruqelo Health is not responsible for external content. Listing an organisation does not imply endorsement.
Always verify with your doctor
Health guidelines vary by country and region. The information in this article is based on international clinical guidelines but may not reflect the specific guidelines, medications, or practices in your country. Always discuss your health concerns with your own doctor or healthcare provider, and refer to your local national health guidelines where available.
Important notice This information is for educational purposes only. It does not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider about your specific situation. If you are experiencing a medical emergency, call your local emergency services immediately.
Related conditions
Sources and guidance
This article is educational and is prepared with reference to recognized health information and clinical guidance sources where available. Specific source links may vary by topic.
Last updated: July 31, 2026
Educational note: This information is for education only and is not a diagnosis.
Use it to support, not replace, advice from a licensed clinician.
If symptoms are severe, worsening, or urgent, call your local emergency number or seek emergency care.