Involuntary facial muscle contraction
What is hemifacial spasm?
Hemifacial spasm (HFS) is an involuntary twitching or contraction of the facial muscles on one side of the face. Hemifacial spasm (also called tic convulsif) is an involuntary twitching of the facial muscles on one side of the face. Hemifacial spasm can be caused by injury to the.
Hemifacial spasms happen when the muscles on only one side of your face twitch without warning. These types of spasms are caused by.
Description:Outlook Hemifacial spasm is a condition in which the muscles contract in tics or twitches on one side of the face, usually the left. People do not have control over these spasms, and very often they continue even during sleep. Hemifacial spasm is usually not painful and not considered a health hazard. In advanced cases, however, the eyes may remain squeezed shut for long enough to become dangerous when driving, for example. Both men and women can develop these facial twitches, but women, especially middle-aged and older women, develop hemifacial spasm at about twice the rate of men.