Billie Eilish has Tourette's syndrome, a brain disorder characterized by repetitive and involuntary sounds and motions. The singer spoke about her tics in a recent interview with David Letterman. She ...

Motor tics are spasmodic contractions of muscles, which typically involve the face and are habitual. Examples include squinting the eyes, grimacing, or even turning the head. Sometimes motor tics ...

At first glance, tics and body-focused repetitive behaviors (BFRBs) can look remarkably similar. Both involve repeated behaviors that may seem involuntary, often start in childhood or adolescence, and ...

The sudden onset of tics and tic-like behavior likely have to do with stress and certain types of social media use. Credit: martin-dm / Getty Images Every year, children and their parents seek medical ...