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Juvenile rheumatoid arthritis (JRA), often referred to by doctors today as juvenile idiopathic arthritis (JIA), is a type of arthritis that causes joint inflammation and stiffness for more than six weeks in a child aged 16 or younger. It affects approximately 50,000 children in the United States.
Juvenile idiopathic arthritis is currently the most widely accepted term to describe various types of chronic arthritis in children. In general, the symptoms of juvenile idiopathic arthritis include joint pain, swelling, tenderness, warmth, and stiffness that last for more than 6 continuous weeks.he most common symptom of all types of juvenile arthritis is persistent joint swelling, pain, and stiffness that is typically worse in the morning or after a nap. The pain may limit movement of the affected joint, although many children, especially younger ones, will not complain of pain.