What causes teeth to ache after i eat barbecue or meat?

Vague: Do you teeth ache after eating other foods? Is it the temperature or the consistency of the meat that is causing the aching for you? You should see a dentist and they will get a thorough history, exam and x-rays to help them hopefully determine the cause of your issues.

Possibly your gums: One possibility is that if you have spaces between your teeth, either naturally or because the fillings don't quite fill the spaces, there could be tiny gaps. If there are, a common complaint is "when i eat meat, it gets packed between my teeth" and if that's the case, it could irritate your gums causing pain.