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 ...

Blepharospasms and hemifacial spasms can be treated with regular injections of botulinum toxin. Also known by the brand name Botox, the medication produced from the bacterium Clostridium botulinum ...