I have juvenile idiopathic arthritis and am experiencing bad jaw pain. when it gets extremely bad are there any methods i can use to relieve some pain?

See details: You do not mention your current meds so any specific advise is difficult. Has an MRI of the tmjs been done? Have you explored other treatment options such as a bite plate. Speak with the doctor who treats your jra.

"Jaw rest": Otc nsaids, heat application, soft food diet, avoid chewing gum or any parafunctional habits, oral splint therapy, corticosteroid delivery via sonophoresis or iontophoresis and pt. Best to get early advanced imaging to establish joint health - both hard and soft tissue - and see if any early degenerative changes are occurring. See an oral and maxillofacial surgeon for thorough evaluation and f/u.