I have had pain in my upper right teeth for almost 2 years. The endo did a root canal on tooth 2. Pain was still there. Did a retreatment on tooth 3. Pain still there. Had tooth 3 extracted. Pain still there. Had root canal in tooth 4. Pain still there. It started off as a nagging pain but now it hurts badly all the time. It's a throbbing pain which seems like it's in tooth 4 but obviously there has been a lot of guess work and no one knows for sure. I had 3 or 4 infections in tooth 3/4 in one year. Tooth 4 has never had a cavity or a filling. I was even given Tegretol by one dentist who thought it may be trigeminal neuralgia but it didn't help. The last endo who did the root canal on tooth 4 suggested there may be a crack in that tooth somewhere that can't be seen on x ray. It was painful to bite on it but it hurts all the time, with or without chewing. After this root canal, which was done 2 weeks ago, the tooth is so sore on top of the usual pain. I am so tempted to have it extracted but i don't want to lose all my teeth chasing after a pain that nobody can tell from where it originates. This is affecting the quality of my life. I can't play sports b/c it makes my tooth hurt. I am losing weight b/c I can't chew. And no one can help me. Please offer any suggestions that i can take back to the dentist. Thanks.