Tic disorder refers to the onset of the disease in childhood and adolescence, mainly manifested as involuntary, purposeless, repetitive, rapid motor tics and vocal tics in one or more parts of the muscle group, and may be accompanied by other behavioral symptoms, including inattention, hyperactivity, self-injury and obsessive-compulsive disorder. The cause of tic disorder is not yet clear, and the course of the disease varies. If it persists for a long time, it can become a chronic neuropsychiatric disorder. The most common tic disorder in childhood is transient tic disorder, also known as tics or habitual spasms, with a prevalence of about 1% to 7%. Males are more than females, and the majority are aged 5 to 7 years old. Foreign literature reports that the prevalence of Tourette syndrome (i.e. Tourette syndrome) is 0.1% to 0.5%. In recent years, the number of reported cases in China has gradually increased, but there is little epidemiological survey data. Gao Qingyun (1984) investigated 17,727 children aged 8 to 12 years and found 43 cases of Tourette syndrome, with a prevalence rate of 2.42‰, which was higher in urban areas than in rural areas. He also found significant differences between environmentally polluted areas and non-polluted areas.