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Juvenile Idiopathic Arthritis (JIA)

Approximately 12,000 children and young people in the UK have Juvenile Idiopathic Arthritis (JIA) which represents 1 child in every 1,000 under the age of 16. There are approximately 1,200 new cases of JIA diagnosed every year.

There are several types of JIA and these are determined by the number of joints that are affected in the first 6 months of the disease.  

JIA is an autoimmune disease, where your immune system gets confused and attacks healthy joint tissue, causing inflammation. Research is ongoing as to why this should occur. JIA can sometimes be seen in association with other autoimmune conditions. This inflammatory disease principally affects the joints, but may also affect other organs including the eyes.


  • Juvenile - A child aged less than 16

  • Idiopathic - Of an unknown cause

  • Arthritis - Inflammation of the joints

JIA-at-NRAS is a service operated by NRAS that supports children and young people living with JIA. Aside from offering patient-focused services, it also supports cares and families affected by JIA as well as the healthcare professionals working in the field.


To read more about JIA, visit the JIA-at-NRAS website at

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