Chattering teeth – that rapid, sometimes noisy clack of your upper and lower teeth – is a minor, startling symptom that can ...

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 ...

How to stop lockjaw depends on its cause. Lockjaw, also known as trismus, is not always caused by tetanus. It can also result from trauma, temporomandibular joint (TMJ) disorders, oral infections, or ...

Mucoepidermoid carcinoma is a type of salivary gland cancer. It does not always cause symptoms, but when symptoms occur, they can include facial pain and tenderness, facial paralysis, jaw spasms, and ...

A muscle spasm — also known as a charley horse, muscle cramp or twitch — is a sudden, involuntary movement in one or more muscles. Common causes include stress, exercise, or dehydration, but nerve ...

‌Hemifacial spasm is a disorder of the nerves and muscles that causes nonpainful involuntary twitching on one side of the face. Many people refer to hemifacial spasms as lip muscle spasms. Hemifacial ...