I have chronic upper teeth pain that remains undiagnosed. This has been going on for about 8 months. Around Christmas of 2007, I had pain in the upper left area. My regular dentist found decay in the very back tooth and also crowned that tooth. Since the crown, I have been back to my regular dentist several times; they have taken several x-rays and can't find any problems. He also referred me to a gum specialist and a root canal specialist - neither of which found anything of concern. The pain ranges from feeling like it's one tooth - to sometimes feeling like it's all the teeth on the upper left side...the pain can also extend into my jaw area..and sometimes that whole side of my face has a "numb' feeling. I can never really pinpoint where the pain is coming from. It can be a constant aching - or even a "decay" feeling like I have a cavity. I can still chew on that side - it's sometime a bit sensitive to cold, but not overly so. I have become very frustrated with the fact that no one can find anything wrong; I certainly don't enjoy going to the dentist over and over - but I know there's something wrong and would really like to get it taken care of! Any ideas?