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.