Arthritis is inflammation of the joint, which causes the joint to feel warm, stiff, swollen, and often painful. If left untreated, the inflammation can damage the cartilage and underlying bone.
Juvenile arthritis is continuous inflammation of one or more joints lasting at least six weeks.
No one knows what causes juvenile arthritis. In some cases, juvenile arthritis is gone by adulthood. With other cases, the disease and its effects are lifelong and require ongoing medical care.
There is no cure for juvenile arthritis, but there are medications that can reduce the inflammation and relieve the pain and swelling. Exercise is also important to help keep muscles and bones strong, keep joints flexible, and reduce pain.