What is Juvenile Idiopathic Arthritis? Juvenile Idiopathic Arthritis (JIA) is a general name for several kinds of arthritis. “Juvenile” means that it affects young people, “idiopathic” means that we don’t know what the cause is, and “arthritis” means inflammation of the joints. Juvenile Idiopathic Arthritis used to be called Juvenile Chronic Arthritis (JCA). In some …
