Q: I had trouble opening my mouth wide when I was getting my teeth cleaned, and the hygienist said it could be TMJ. But my sister, who is a chiropractor, says she thinks it’s a muscle spasm. What is ...

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 can’t relax completely. The term ...

Temporomandibular joint disorders (TMD) might cause the jaw to press on nerves that affect eye movement and contribute to vision issues, such as astigmatism, nearsightedness, and farsightedness. TMD ...