Elbow pain Elbow pain is very common and usually doesn’t have a serious cause. Learn about the causes, symptoms, exercises and treatments. Enthesitis-related JIA Enthesitis-related JIA affects the places where tendons attach to bones, including the legs and spine. Learn about other symptoms. Eosinophilic granulomatosis with polyangiitis Eosinophilic granulomatosis with polyangiitis causes adult asthma and inflammation of the blood vessels. Learn about the causes and symptoms. Extended oligoarthritis Extended oligoarthritis is a type of juvenile idiopathic arthritis (JIA) which affects a number of joints. Learn about the causes, symptoms and treatments.