I have a very high pain tolerance. My dentist says (and I've seen this too) that people on APs often do. Mine is so high that my dentist stopped letting me rate pain and relying on that rating because I went in with a "sore tooth" that he let me decide to crown or not b/c he thought it was ok but would need crowned eventually. When he opened it up it was so infected I was approaching needing IV antibiotics. Now if I say "sore" he thinks "pain". (He's really great b/c he has a brother with bipolar and so is familiar with it and the weird things that can go along).