Add Yahoo as a preferred source to see more of our stories on Google. You rely on your jaw to eat, speak, smile and laugh, so it’s only natural that it feels sore from time to time. But if that pain ...

If you wake up with a headache, sore jaw muscles or achy teeth, you might be grinding your teeth at night or clenching your jaw. The condition — bruxism — is surprisingly common, experts say. Without ...