I went in to the dentist for my regular once-every-two-year cleaning. It came at a good time because my tooth had just recently started aching a bit and so I had them check it. My teeth are generally pretty healthy (only 1.5 cavities so far, despite my infrequent dental checkups and not-so-diligent brushing habits - I think it's because I make loads of saliva. My husband does too, so we have very spitty kisses). Neither the hygenist nor the dentist could spot anything wrong with my achey tooth but in the process of looking all my other teeth started aching a bit too. So my dentist went and got what looked like a hammer and started banging on all my teeth to "check for fractures" but I think he was just getting a kick out of the process. Eventually he grew tired of it and told me I was probably stressed out and grinding my teeth at night. Then they asked me if I had been stressed out lately and I told them that last week I wrecked an entire day trying to get antibiotics from my doctor for that very dental appointment (I have a heart condition) and that had totally stressed me out. They nodded sympathetically and decided that's probably why my teeth hurt. They also prescribed me with some fluoride toothpaste and mouthrinse to strengthen up my teeth and recommended in the future I reduce my doctor-associated stress, which I am starting to believe is impossible.
And just for a note to all you hot yoga non-believers (you know who you are), the dentist thought hot yoga was a great way to loosen up the jaw muscles and prevent the tooth grinding at night. Kudos to hot yoga!