Spasmodic tic is a medical condition characterized by sudden, involuntary muscle movements. There are several synonyms for the term that describe the same condition. One such synonym is tic douloureux, a condition that affects the trigeminal nerve causing intense facial pain. Another synonym for spasmodic tic is hemifacial spasm, a type of dystonia causing involuntary contractions on one side of the face. Other related conditions include blepharospasm, a condition that causes uncontrollable blinking or twitching of the eyelid, and myoclonus, a sudden, involuntary muscle jerk. While these conditions can be distressing, treatment options are available to help manage symptoms.