What causes tics and Tourette syndrome?
Doctors don’t know exactly what causes tics and Tourette syndrome. They do know that Tourette syndrome seems to run in families and affects boys more than girls.
Recognition and Management of Tourette's Syndrome and Tic Disorders by MM Bagheri, J Kerbeshian, L Burd (American Family Physician April 15, 1999, http://www.aafp.org/afp/990415ap/2263.html)
Written by familydoctor.org editorial staff