Juvenile Idiopathic Arthritis (JIA) is inflammatory arthritis that affects young people under the age of 16. Most forms of inflammatory arthritis seen in adults can start in childhood or adolescence although the onset and manifestations may be slightly different in younger patients. Similar treatment approaches are used. However, children and adolescents can have forms of inflammatory arthritis that are unique. As in adults, JIA causes inflammation in the joints or sometimes in the spine and ligaments. When the joints are involved, swelling or problems with mobility may be the only signs of this disorder. For example, in a young child, the first signs of this condition may be a limp. Because young people are still growing, joint damage that may inhibit growth is a particular concern. JIA may be associated with other complications. Most concerning is eye inflammation because it is not easy to detect, can often occur without symptoms, and can cause blindness. Children with JIA may be affected for a finite period of a few months or for a lifetime. It is important that children and adolescents with JIA be assessed by a pediatric rheumatologist.