I. Transitory tic disorder
1. One or more motor and/or vocal tics that manifest as sudden, rapid, repetitive, nonrhythmic and stereotyped movements or vocalizations.
2. Multiple episodes per day lasting at least 4 weeks, but not more than 12 months.
3. The above symptoms cause significant restlessness, social, employment and other areas of activity. Yu Zuoyang, Department of Pediatrics, China-Japan Friendship Hospital
4.Onset before the age of 18.
5.The above symptoms are not caused by certain drugs (such as stimulants) or medical diseases (such as Huntington’s chorea or post-viral infection encephalitis).
6. The diagnostic indicators of chronic motor or vocal tic disorder or Tourette’s syndrome are not met.
II. Chronic motor or vocal tic disorder
1. One or more motor or vocal twitches, which are sudden, rapid, repetitive, non-rhythmic and stereotyped movements or vocalizations that do not occur simultaneously during the course of the disease.
2. Multiple episodes per day, either daily or intermittently, with a duration of more than 1 year, during which the tic-free interval lasts for no more than 3 months.
3. The above symptoms cause significant restlessness and affect social employment and other important areas of activity.
4.The onset is before the age of 18 years.
5.The above symptoms are not directly caused by certain drugs (such as stimulants) or medical diseases (such as Huntington’s chorea or post-viral encephalitis).
6. The above mentioned tics or vocalizations are present, but are not consistent with Tourette’s syndrome.
III. Tourette syndrome
1. There are multiple motor twitches and one or more vocal twitches, sometimes not necessarily occurring at the same time. The twitches are sudden, rapid, repetitive, non-rhythmic, and stereotyped movements or vocalizations.
2. The twitching occurs several times a day, usually in bursts, and the condition has been persistent or intermittent for more than one year, with intervals without twitching not exceeding three months in a row.
3, The above symptoms cause significant restlessness, social, employment and other areas of activity.
4.The onset is before the age of 18.
5.The above symptoms are not directly caused by certain drugs (e.g. stimulants) or medical diseases (e.g. Huntington’s chorea or post-viral infection encephalitis).
IV. Other tic disorders that have not been defined
This category includes tic disorders that do not meet the above diagnostic criteria, such as those with onset lasting less than 4 weeks or those with onset after the age of 18 years.