Have you ever been surprised by an unexpected twitch in your left eye and wondered if it might be more than just a harmless muscle spasm? This brief, involuntary movement, often dismissed as nothing ...

You’re relaxing on the sofa when suddenly your eyelid starts twitching. Or perhaps it’s a muscle in your arm, your leg, or your foot that begins to spasm – sometimes for a few seconds, sometimes for ...

Tic disorders are conditions featuring sudden, non-rhythmic movements or vocalizations. A formal tic disorder diagnosis is determined by tic frequency, duration, and type. Tics are non-rhythmic ...

Since the start of the COVID-19 pandemic, doctors have observed an increase in teen girls experiencing tics — or what appears to be verbal and motor tics. “Tics are sudden, repetitive, non-rhythmic ...