We are using cookies to give you the best experience on our site. Cookies are files stored in your browser and are used by most websites to help personalise your web experience.

By continuing to use our website without changing the settings, you are agreeing to our use of cookies.

Find out more
You are here:

Systemic-onset JIA

A teacher helping young pupils with school work

Systemic-onset juvenile idiopathic arthritis affects children and young people. In this form of arthritis, joint pain is part of a general illness involving fever, tiredness, rash, loss of appetite and weight loss.

  • You may have enlarged glands in your neck, under your arms and around your groin area. Your doctor may find your spleen and liver are enlarged, and, very occasionally, the covering of the heart is inflamed (pericarditis).
  • In the first few weeks there may be no sign of swollen joints, and the diagnosis may be uncertain. Lots of tests may be needed to confirm the diagnosis and this can be a worrying time.
  • The long-term development of this form of JIA can be difficult to predict but usually the fever and rash will settle, although the arthritis may sometimes continue for several years before settling.

Read more about JIA.


0800 5200 520

Our new helpline: Call us for free information, help and advice on your type of arthritis. Open Mon–Fri 9am–8pm.

All calls are recorded for training and quality purposes

Virtual Assistant

Our new Arthritis Virtual Assistant uses artificial intelligence to answer your arthritis related questions 24/7.

Ask a question
For more information, go to
Arthritis Research UK fund research into the cause, treatment and cure of arthritis. You can support Arthritis Research UK by volunteering, donating or visiting our shops.