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JIA Explained is the place for information on all things Juvenile Idiopathic Arthritis. We hope that with our help you are able to learn more about this chronic condition and educate the people around you!

What is JIA?

Juvenile Arthritis is a chronic illness manifested in children under eighteen. It comes in the form of fever, swelling, rashes, and pain.

JIA Definition


Juvenile Idiopathic Arthritis is an autoimmune disease where the child or teenager’s bodily immune system fiercely and constantly attacks their joints, resulting in inflammation, pain, burning, swelling, stiffness, and eventually losing the joints. It induces limited range of motion in affected joints, making normal everyday tasks way more challenging than usual or even impossible for children wielding the chronic condition. Juvenile rheumatoid idiopathic arthritis (JIA) includes subtypes such as oligoarthritis, which affects less than five joints, and polyarthritis, which affects five or more joints. While JA is extremely rare, affecting less than 300,000 kids, polyarthritis is much less common than the more observed oligoarthritis.

​ Juvenile Rheumatoid arthritis is an autoimmune disease where the child’s bodily immune system fiercely attacks the joints, leading to inflammation, pain, burning, swelling, stiffness, and eventually losing the joints. It can result in swelling and limited range of motion in affected joints, making  normal everyday tasks challenging or even impossible for children wielding the chronic condition.

 In JIA, the immune system mistakenly targets the synovium, the lining of the joints, leading to joint damage over time. This chronic condition can affect multiple joints throughout the body, making daily activities challenging for those affected. Since there is no single definitive test for JIA, healthcare providers need to consider all these different pieces of information to make an accurate diagnosis. Blood tests can measure inflammatory markers and specific immune markers to help diagnose conditions like rheumatoid arthritis. In some cases, additional imaging studies such as X-rays or MRIs, as well as joint fluid analysis, may be needed to confirm the diagnosis.

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