Ugeskr Laeger 2002 Aug;164(32):3755-9. Odense Universitetshospital, Det børne- og ungdomspsykiatriske hus.
Tics are often associated with a preceding uncomfortable sensation or urge that builds, then is resolved by the action for a period of time, and then builds again. Tourette Syndrome is a complex, genetically inherited disorder whose primary symptoms include tics (both motor and vocal) lasting for more than one year, beginning before age 18. Tics may only need to be treated if they are causing significant problems.