Type of disease: Rare conditions
Hemifacial spasm is a type of facial muscle spasm that occurs only on half of a person’s face. They are often caused by nerve injury or tumors, although not infrequently a precise cause is unable to be found. The condition is rare, occurring in less than one person per 100,000. The twitching that occurs is not painful, but can cause embarrassment. Treatment for hemifacial spasms may include medication, botox injections, or surgery to repair affected nerves.