Hemifacial spasm is a medical condition where involuntary muscle contractions occur on one side of the face. This term refers to a very specific medical condition, and there are no widely recognized synonyms for hemifacial spasm. However, some people may use different terms to describe the symptoms associated with this condition, such as facial twitching, facial spasms, or facial dystonia. These terms can be used interchangeably, but it's important to remember that hemifacial spasm is a medical diagnosis that should be made by a healthcare provider. Treatment options for hemifacial spasm may include medications, botulinum toxin injections, or surgery.