Hemifacial spasm is a neuromuscular disorder that causes frequent involuntary contractions to occur in the muscles on one side of the face.
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Hemifacial spasm doesn't always have a specific cause. It may occur as a result of:
- A blood vessel pressing on the facial nerve
- Facial nerve injury
- Bony or other abnormalities that compress the nerve
Hemifacial spasm is more common in middle-aged and elderly women. It is also more common in Asians.
- Intermittent twitching of the eyelid muscle
- Forced closure of the eye
- Spasms of the muscles of the lower face
- Mouth pulled to one side
- Continuous spasms involving all the muscles on one side of the face
Your doctor will ask about your symptoms and medical history. A physical exam will be done. Tests may include:
- Electromyography (EMG)—records electrical activity generated in muscle while contracting and relaxing
- Angiography —uses contrast material to see blood vessels
Talk with your doctor about the best treatment plan for you.