Juvenile arthritis (JA) is not a disease in itself. Also known as pediatric rheumatic disease, JA is an umbrella term used to describe the many autoimmune and inflammatory conditions or pediatric rheumatic diseases that can develop in children under the age of 16. Juvenile arthritis affects nearly 300,000 children in the United States.
Although the various types of juvenile arthritis share many common symptoms, like pain, joint swelling, redness and warmth, each type of JA is distinct and has its own special concerns and symptoms. Some types of juvenile arthritis affect the musculoskeletal system, but joint symptoms may be minor or nonexistent. Juvenile arthritis can also involve the eyes, skin, muscles and gastrointestinal tract.