[wjb3]

I have noticed on multiple occassions that under conditions of extreme exertion (i.e., exceeding my textbook maximum heart rate), I get pain in my mouth, almost like every tooth has an infected cavity. I had always just found it an interesting effect. But, in reading this, I presume that elite athletes are in such states far more often than I, and that whatever the underlying mechanism is that causes the pain might also be deteriorating the dental health. I've never been able to find a plausible explanation of the effect that tracks with my actual circumstances (i.e., as far as my dentist and I can tell, I have excellent dental health, but I am not an elite athlete, just a weekend warrior who sometimes overdoes it).

[kaliszad]

Consult a passionate dental hygienist or get a second opinion from a different dentist. Either you are doing yourself no favors by biting to push over the top and should probably get some kind of a retainer like boxers have to prevent overloading your teeth.

Or you are one of many people that have been told how great their teeth are yet which have periodontitis/ gum inlfamation. (Source: My wife is an established dental hygienist keeping up with the newest approaches, going to advanced courses, visiting conferences.) If your gums are redish instead of light pink that's a good indication. If you are bleeding on regular use of interdental brushes/ flossing that's another hint something might be off.

[jemmyw]

I get something similar, not pain but definitely sensations. It was more apparent when I was having dental work done, and the dentist did say to not over exert straight after visiting him because of the increase of blood flow to the gums.

You might just have sensitive gums. There are a couple of places where mine are really sensitive even though there's no disease or teeth issues around them. Because of the other tooth work (implants) I've had a lot of scans and probing of my whole mouth by multiple people so I'm certain there's no problems there - so it's very possible you have no underlying issue either.

[dilyevsky]

More likely than not you just clench your jaw