Objectives: Tourette s yndrome(TS)and tic disorder may increase the likelihood of social and emotional difficulties which may have negatively impact an individuals personality and self-perception.Prevalence estimates in school aged children range from 1 to 10 per 1000,with a rate of 6 per 1000 replicated in several countries.In a study in 2003,the prevalence rate of Tourettes syndrome in Taiwan was around 0.56%.The ratio of male to female was 9 to 2.