Juvenile Rheumatoid Arthritis also known as Juvenile Idiopathic Arthritis (JIA). It's not known precisely what causes JIA in children. Examination demonstrates that it is an immune system sickness. In immune system illnesses, white platelets can't differentiate between the body's own particular sound cells and germs like microbes and infections. The safe framework, which should shield the body from these destructive trespassers, rather discharges chemicals that can harm sound tissues and reason aggravation and torment.