When I have this one tooth (behind canine/upper) worked on, I get electric shock type pain with uncontrollable twitching sensation in upper lip above and forward of that tooth. Like a nerve was being probed. Because it's so short lived, I am not concerned, but the feeling I get - a sense of dread and irritability that causes me chest pain; now that concerns me. This has happened 2x in that one tooth. No others (and I've had extensive work).

Does anyone have an explanation?