Hemifacial spasm (HFS) is a neurological disorder manifested by twitching on one side of the face due to involuntary contractions of the eyelid and other facial muscles. It usually begins gradually ...

With hemifacial spasms, a neuromuscular disorder, an eyelid spasm progresses to incorporate the brow and muscles in the lower face, often pulling the mouth to one side. Eyelid spasms differ from ...

Persistent eye twitching might be a sign of more severe health conditions, such as blepharospasm and hemifacial spasms. Eye twitching results from spasms in the muscles that control your eyelids.