‌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 ...

Botox (onabotulinumtoxinA) is a prescription injection used to treat certain medical conditions by relaxing specific muscles and glands. It comes as a powder that a healthcare professional will mix ...