Hemifacial spasms are involuntary facial contractions or twitches occur on one side of the face. Although hemifacial spasms are not painful, they can be embarrassing, interfere with social interaction, and affect a person’s eyesight. Relief from Hemifacial Spasm symptoms will last for approximately 3 to 6 months. Patients will need to return for treatment after this allotted time to maintain their results.