I am sick of having Hemifacial spasm (HFS) is a rare neurological disorder that causes involuntary twitching or contractions of facial muscles on one side of the face. It's a type of peripheral movement disorder, meaning the source is a nerve issue that manifests as muscular contractions. HFS is usually caused by a blood vessel touching or pulsing against a facial nerve. It started as an eye twitching here and there. I've had it since 2019#hsf