Another red flag: Pain that gets worse when you bend over, lie down, or press on your cheeks. How to ease jaw pain: Most cases of sinusitis start clearing up within a week. "And as your sinuses ...

A person who does not smile may also have physical face pain when they smile. Something like teeth grinding at night can ...

The apparent take-home of this study is to fake a smile when you’re feeling stressed or in pain. But it may be a bit more complicated than that.

See images from the Smile 20 stunt at the Knoxville Marathon here. "We're all about helping people fight pain when they need it most, and no one needs it more than a marathoner," says Frank Paukowits, ...