Profile: Liu Changyi, chief physician, special expert in pediatrics of Dongcheng Hospital of traditional Chinese medicine, researcher of world medical research center. Born in a family of traditional Chinese medicine, he is the son of Liu Bichen, the "king of children in Beijing". He graduated from Beijing University of traditional Chinese medicine and has been engaged in clinical work of traditional Chinese medicine for more than 20 years. He is good at treating various difficult diseases in pediatrics, such as children's twitch, Tourette's syndrome, asthma, nephritis, myocarditis and severe muscle weakness. During the epidemic period, primary and middle school students ushered in the home study life. Recently, Xiao Wang's parents found that their children were not focused and unstable in Internet class. They often lost their temper, and sometimes they even uttered a few dirty words. "At first, I just thought that the children were not used to this learning method, but after a few weeks, the children's situation has not improved, and they also have the problem of making faces." Xiao Wang's abnormal behavior aroused the parents' vigilance and immediately brought him to Liu Changyi's consulting room. "The child may not be mischievous and mischievous, but may suffer from children's Tourette's syndrome, which is not under subjective control." Liu Changyi said that the disease mostly occurs in children between 5 and 12 years old, and generally more boys than girls. The characteristics of TiC are many symptoms, long disease course and difficult to cure. "Without early and active treatment, the symptoms may continue to the middle and old age." Liu Changyi's father was Liu Bichen, the famous "king of children in the capital". He initiated the school of regulating the lung in pediatrics of traditional Chinese medicine. He believed that the lung was the cover of the five viscera, and external pathogens invaded the lung first. After the lung was infected, it was easy to cause other visceral diseases. Liu Changyi has studied with his father for more than 20 years. He has been assiduous in the diagnosis and copying of prescriptions. He inherits and develops the treatment idea of "regulating the lung". He believes that children's Tourette syndrome belongs to liver wind syndrome. It is caused by phlegm in the lung channel, wind in the liver channel and hyperactivity of liver yang. To alleviate and cure the disease, it is necessary to treat it from the liver and lung. Based on his father's theory of regulating the lung and his own clinical experience of more than 40 years, Liu Changyi often takes the magnolia, Xanthium sibiricum, radix ginseng, Radix Isatidis and Radix Sophorae root, which are used for dispersing the wind and dispersing the lung, benefiting the throat and opening the orifices, as the basic formulas, and then flexibly adds and subtracts them in combination with the clinical manifestations of the patients. Since most of the patients are children, Liu Changyi also added sweet Stevia to the prescription, which not only helps children to more easily accept the taste of Chinese herbal soup, but also has the effect of generating saliva, relieving thirst, reducing blood pressure and reducing fat. After a period of traditional Chinese medicine treatment, Xiao Wang's TIC has improved and his academic performance has also improved. "Traditional Chinese medicine has a good effect on the treatment of children's tic, but we must adhere to the treatment. Generally speaking, the course of treatment should last for half a year to one year." Since the school of regulating the lung stresses prevention first, diet and nursing are excellent treatment methods, and the onset of children's tic is related to respiratory tract infection, digestive tract infection and mental allergy, Liu Changyi specially instructed the patients to pay attention to diet, life, study and other aspects to avoid recurrence of the disease. Patients should keep warm to avoid catching cold. The diet is light. Eat more vegetables and fruits. Avoid big fish and meat, raw garlic and onions. Say "no" to carbonated drinks and puffed food. Liu Changyi reminded parents not to put too much pressure on their children to learn, avoid "stick" education, and let children play less mobile phones and less