What Causes Enthesitis-Related Juvenile Idiopathic Arthritis?
Enthesitis-related JIA happens when the immune system, which normally attacks germs, mistakenly attacks the joints. This causes inflammation (swelling and irritation) in the joints and other problems in the body.
Doctors don’t know exactly why kids and teens get JIA. “Idiopathic” means “from an unknown cause.” It can run in families but often does not. It’s likely due to a combination of: