Medically reviewed by Edmund Khoo, DDS Lockjaw (trismus) is a painful condition that limits your ability to open your mouth all the way. It occurs when the muscles you use to chew spasm, meaning they ...

Falling asleep with our mouths open happens to all of us and many think it isn't such a big deal. However, there are some eye-opening things connected to open-mouth sleeping. Our facial muscles ...

In today's Asking Eric column, R. Eric Thomas responds to someone who doesn't understand why people chew with their mouth open.