Hi ,
To answer your question, yes! When I was first diagnosed with RA I did not understand that it could manifest itself in any and every joint--including the jaw. I went to the dentist thinking it was a problem they could solve but they didn't have any answers. Eventually it went away and it wasn't until later that I realized it must have been the RA. Since then, I've had inflammation in every joint. I always assume that it's RA and wait for it to pass. Like Ashley mentioned, you should speak with your doctor if the pain isn't going away to see if there's steps you can take.
Good luck!
Franki, RheumatoidArthritis.net Team