In Still's disease the whole body seems to react to the inflammatory stimulus, causing fever, rash, swollen lymph nodes, enlarged liver, and spleen as well as possible swollen joints. The heart and lungs can be involved in the inflammatory process as well. While the diffuse inflammatory symptoms do generally resolve over time, children with Still's disease tend to get more persistent joint symptoms later on.
There are many treatments for JRA, and many children who have it eventually "outgrow" it and don't continue to have symptoms as an adult. Anti-inflammatory medications and physical therapy are the usual treatments. A small percentage of children with JRA have persistent and debilitating symptoms into adulthood. They may require continued medication and/or surgery, and can have permanent disability due to loss of the joint function.