Hemifacial spasm (HFS) is a rare movement disorder that causes involuntary muscle contractions on one side of the face. It typically starts with painless but annoying twitching around one eye ...

Men and women of any age can get hemifacial spasm, but it is most common in 40-year-olds to 79-year-olds. This disorder is also almost twice as common in women (0.0074% of men and 0.014% of women).

Hemifacial spasm: Compared to facial myokymia, these are longer-lasting contractions. Strong facial spasms may force your eyelid closed or pull your mouth to one side.

Hemifacial spasm: Unlike benign essential blepharospasm, hemifacial spasm typically affects only one side of the face. It can cause twitching in the eyelid as well as other facial muscles.

Hemifacial spasm: is a neuromuscular disorder that involves involuntary jerks affecting one side of the face, including the eye, but also often muscles that control the eyebrows, ...

DEAR ABBY: I have hemifacial spasm (HFS), a relatively rare disorder characterized by random and uncontrollable spasms on one side of the face. HFS can sometimes be alleviated through surgery and ...