What are the different types of juvenile arthritis?

Be more specific!: Are you referring to jra (juvenile rheumatoid arthritis) or jia? Or any arthritis in children?

Many, all treatable: Juvenile idiopathic arthritis (same as jra, newer name) can be classified into several categories: oligoarticular jia (4 or fewer joints affected), polyarticular jia (more than 4 joints affected), psoriatic arthritis (arthritis in kids with psoriasis, nail changes, whole finger/toe swelling), inflammatory bowel disease-associated arthritis, enthesitis-related arthritis, ankylosing spondylitis.

JIA types: The most serious type and the most uncommon is system JIA which causes high fevers, arthritis, a salmon colored rash, and inflammation of internal organs. Other types include a form that causes arthritis in just a few joints (such as a knee or a wrist) and the polyarticalur form which can affect many small joints (fingers, toes, TMJ, wrists, ankles, and many others)