The causes of tic disorder are mainly the following: 1) genetically related, many people with tic disorder can find similar symptoms in the family elders, maybe father, mother or relatives of the family, who also had tics as a child, or genetically related, but there is no clear gene; 2) related to neuroendocrine neurotransmitters, such as 5-hydroxytryptamine, norepinephrine, etc.; 3) psychosocial factors, mainly related to The main factor is that the family is very unstable, mom and dad fight all day, criticize a lot, and even scold, and parents with a little compulsive trait ask children to be good, sit well, and obey, this can not move that can not move, that is the restrictive parents bring out. Children with restrictive parents are more likely to have tics. It is difficult to adjust the genetic aspects, but we hope that the family will make psychosocial adjustments to the child.