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A teacher helping young pupils with school work

Polyarthritis is a type of juvenile idiopathic arthritis (JIA).

  • This type of JIA tends to cause painful swelling in fingers, toes, wrists, ankles, hips, knees, and the neck and jaw.
  • It may come on suddenly or can steadily involve more joints over a period of months.
  • You may feel unwell and tired and occasionally develop a slight fever.
  • The symptoms may continue into adult life but it can go into a state where all the symptoms disappear. This is called remission.
  • A blood test will show whether a marker called rheumatoid factor is present in your blood.

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
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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.