Finding out your child has arthritis can be a shock. Juvenile idiopathic arthritis (JIA) is the most common type of arthritis in children, affecting about 1 in 1,000 in the UK (CCAA, n.d.). Here are clear answers to the questions parents ask most.
The main types of JIA, and why eye checks matter.
What is JIA?
JIA is arthritis that starts before the age of 16 and causes joint inflammation lasting 6 weeks or longer (Leeds Teaching Hospitals, n.d.). Juvenile means it starts in childhood, idiopathic means the exact cause is not known, and arthritis means inflamed joints. It is an autoimmune condition: the immune system attacks the joints by mistake (Arthritis UK, n.d.).
What are the types?
Arthritis UK describes six main types. Oligoarthritis is the most common, and some organisations split polyarthritis into two groups (Arthritis UK, n.d.; CCAA, n.d.).
| Type | What it means |
|---|---|
| Oligoarthritis | Four or fewer joints, often the knees and ankles |
| Polyarthritis | Five or more joints; similar to rheumatoid arthritis in adults |
| Systemic JIA | Affects the whole body, with fevers and a rash |
| Enthesitis-related arthritis | Inflammation where tendons attach to bone, often in the feet, hips and spine |
| Psoriatic arthritis | Arthritis with the skin condition psoriasis |
| Undifferentiated arthritis | Does not fit neatly into one type |
Did we cause it? Will others get it?
No. Nothing you did caused your child's JIA, and it is not catching. Genes play a part, but JIA is not directly inherited, and it is extremely rare for more than one person in a family to have it (CCAA, n.d.).
Will my child grow out of it?
JIA is not something children simply grow out of, but it can go into remission, when symptoms settle. Up to half of children with JIA may go into full remission before adulthood (Leeds Teaching Hospitals, n.d.), and most people with JIA can expect to live long and full lives (Arthritis UK, n.d.).
Key insight: keep every eye-screening appointment
JIA can cause uveitis, inflammation inside the eye. It often has no obvious signs, so it cannot be spotted at home. The first eye check should be within 6 weeks of diagnosis, using a special microscope called a slit lamp, and then regularly (Cambridge University Hospitals, n.d.). Keep every appointment, even when your child seems well.
How is JIA treated?
- Medicines: anti-inflammatory painkillers (NSAIDs), disease-modifying drugs (DMARDs), steroids (including joint injections) and biologic medicines (Arthritis UK, n.d.).
- Methotrexate is taken once a week, on the same day. Folic acid is usually prescribed to take on a different day. Your child will need regular blood tests (JIA at NRAS, n.d.).
- Physiotherapy and occupational therapy help keep joints moving and make daily life easier.
Can my child be active?
Yes. Keeping active helps stop joints stiffening, builds strength and supports mood and confidence. Swimming, cycling, dancing and walking are good choices, and a physiotherapist can help plan what suits your child.
What about vaccinations?
Vaccines are important, but always check with your child's rheumatology team first, as some live vaccines may not be suitable with certain JIA medicines. If your child is not immune to chickenpox, the vaccine may be given before they start methotrexate (JIA at NRAS, n.d.). Children with a severely weakened immune system should have the flu injection instead of the nasal spray, and any parent can ask for the injection (NHS, n.d.).
Diet, flares and school
- Diet: there is no special JIA diet. A balanced diet and healthy weight help. See our post Are there foods proven to make JIA worse?
- Flares: if pain, swelling, stiffness or tiredness get worse, contact the rheumatology team, usually the specialist nurse.
- School: talk to the school early about morning stiffness, PE, extra time and appointments. Arthritis UK has information for schools.
Where to get support
- Arthritis UK: helpline 0800 5200 520 (Monday to Friday, 9am to 6pm) and the free Young People and Families Service.
- JIA at NRAS: information and support on 0800 298 7650.
- CCAA: family weekends and local groups.
References
Arthritis UK (n.d.) Juvenile idiopathic arthritis (JIA). Available at: https://www.arthritis-uk.org/information-and-support/understanding-arthritis/conditions/juvenile-idiopathic-arthritis/ (Accessed: 27 September 2026).
Cambridge University Hospitals NHS Foundation Trust (n.d.) Eye screening for uveitis in paediatric rheumatology patients. Available at: https://www.cuh.nhs.uk/patient-information/eye-screening-for-uveitis-in-paediatric-rheumatology-patients/ (Accessed: 27 September 2026).
CCAA (n.d.) About JIA. Available at: https://www.ccaa.org.uk/about-jia/ (Accessed: 27 September 2026).
JIA at NRAS (n.d.) Methotrexate for children and young people. Available at: https://jia.org.uk/methotrexate-for-children-and-young-people (Accessed: 27 September 2026).
Leeds Teaching Hospitals NHS Trust (n.d.) Juvenile idiopathic arthritis (JIA): parents. Available at: https://www.leedsth.nhs.uk/patients/resources/juvenile-idiopathic-arthritis-jia-parents/ (Accessed: 27 September 2026).
NHS (n.d.) Child flu vaccine. Available at: https://www.nhs.uk/vaccinations/child-flu-vaccine/ (Accessed: 27 September 2026).
Join the Zero Jargon Health Community
Threads · Instagram · Facebook
Important medical disclaimer
The content provided in this blog post is for educational and informational purposes only and does not constitute professional medical advice, diagnosis, or treatment. Always seek the advice of your GP, psychiatrist or another qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read on this website. Never start, stop or change a prescribed medicine without speaking to your prescriber first.
No comments:
Post a Comment