Is hemifacial spasm dangerous?

It is a condition that causes the muscles on one side of your face to contract involuntarily. There are several causes for hemifacial spasms, but the most common is a lesion or tumor on the facial nerve. Other causes can include head injuries, multiple sclerosis, and strokes. 

 

for more updates and read further :

Everything About Hemifacial Spasm: Symptoms, Causes, and Treatments