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Living with Systemic-onset juvenile idiopathic arthritis

A rare childhood rheumatic disease with long-lasting joint swelling, high spiking fevers, and a rash.

Understanding Systemic-onset juvenile idiopathic arthritis

Systemic-onset juvenile idiopathic arthritis is a rare childhood rheumatic disease that causes arthritis, high fevers, and rash.

Children have chronic arthritis and intermittent high spiking fevers. A rash may appear during fevers. The liver, spleen, and lymph nodes may be enlarged, and the lining of the lungs or heart can be inflamed (serositis). It usually begins in childhood.

Signs & symptoms

Symptoms vary from person to person. GARD lists these among the most common:

  • Arthritis with joint pain and swelling
  • High spiking fevers
  • Skin rash during fevers
  • Swollen lymph nodes
  • Enlarged liver or spleen
  • Autoimmune problems

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Specialists who may be involved include autoimmune and inflammatory disease specialists and lung and breathing specialists.

  3. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

Care & treatment

Care team
autoimmune and inflammatory disease specialists (rheumatologists); Lung and breathing specialists (pulmonologists)
Expert care
Ask about multidisciplinary care centers for rare conditions
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with The International Foundation for Autoimmune & Autoinflammatory Arthritis
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
Which specialist, such as pediatric rheumatology, should follow my child?
How can fevers and joint pain be managed?
What should we watch for if symptoms change?

Quick facts

Symptoms usually startChild

GARD doesn't describe a cause for this condition yet.

Respiratory

Also known as: sjia; sojia; still disease; systemic polyarthritis; systemic-onset jia

Patient organizations

Source: NIH GARD · Systemic-onset juvenile idiopathic arthritisGARD ID 10966 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

Perspectives from people navigating life with Systemic-onset juvenile idiopathic arthritis.

Explore the Systemic-onset juvenile idiopathic arthritis blog

Explore research for Systemic-onset juvenile idiopathic arthritis

Explore actively recruiting Systemic-onset juvenile idiopathic arthritis studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Systemic-onset juvenile idiopathic arthritis with HealthSpark. Share your city to explore research near you.

  • Recruiting studies from ClinicalTrials.gov
  • Share your city to look for research near you
  • Eligibility is confirmed by the study team

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Powered by HealthSpark, our AI chat helper · Study information from ClinicalTrials.gov · Eligibility is confirmed by the study team.

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