Childhood autism is a group of disorders characterized by loneliness, lack of emotional response, impaired language development, stereotyped repetitive movements and peculiar reactions to the environment. Early signs of childhood autism include not smiling at relatives, not reaching out to prepare to be picked up by relatives, and not putting his body close to his mother’s when she wants to pick him up. Mother. Children with social difficulties are particularly lonely, lacking interaction and emotional connection with others, and are unattached to their parents, even as strangers. However, they do not feel intimidated by strangers. While normal children often express their feelings and requests by gazing at each other, children with social difficulties lack the ability to express their feelings and requests in this way by gazing eye-to-eye. The child is friendless until about 5 years of age, rarely plays with children, lacks emotional responses, and often says or does things that are not socially appropriate. Children with language delays have a low ability to understand and express language, are unable to understand slightly more complex sentences, and cannot use gestures to say “goodbye”. They do not understand and use facial expressions, movements, gestures and tones to interact with others. They lack imagination and social simulation, and cannot use toys to “cook”, “drive trains”, or “build houses” like normal children. Some children have stereotyped language and misuse pronouns, such as “I want” as “you want”. Due to the lack of variation and imagination, children with ritualistic and compulsive behaviors often insist on repeating stereotypical play patterns, such as repeatedly lining up toys, always playing with their toes, and expressing opposition and discomfort to any changes in their room, such as the shifting of furniture and changes in decorations. In addition, some children may also have perceptual impairment, with dullness or hypersensitivity to multiple senses such as sight, hearing, and touch. Some have cognitive impairment, low intelligence and very poor abstract thinking skills, and a few children may have seizures. The causes of autism in children are still inconclusive, but are mostly thought to be related to genetic, organic and environmental factors. Genetic factors are more likely to occur in siblings of children with autism than in others, with a higher rate of monozygotic twins and 41% of children with long Y chromosomes. Their fathers and brothers were also found to have long Y chromosomes, thus suggesting a genetic link. Organic factors such as brain injury, maternal rubella infection during pregnancy, having suffered from meningitis and encephalitis, etc. In recent years, studies have found that enlargement of the left temporal horn of the ventricle is more common in affected children, suggesting lesions of the medial temporal lobe structures. Environmental factors It has been suggested that the lack of rich and appropriate stimulation in the early life environment is an important factor in the onset of the disease. Children who have been in a monotonous environment for a long time will use repetitive movements for self-stimulation and will not become interested in the external environment. Some children have parents who are professional technicians, highly educated, intelligent, but stereotypical, and often do not pay enough attention to their children’s early education because they are busy at work, etc. The prognosis of this disorder is mostly poor, often residual behavioral disorders, so that difficulties in adaptation, unable to live independently, a few people can adapt to social life when they grow older. The prognosis is related to the level of intelligence, and the prognosis is poor for those with severe intellectual impairment. The most important treatment for children with autism is education and behavior therapy, which aims to promote the education of normal behaviors of the affected children, especially the correction of social behaviors, the correction of abnormal behaviors, such as stereotyped movements, and the elimination of secondary symptoms such as sleep disorders, tantrums and hyperactivity. Family members of the child should also pay attention to overcoming anxiety, self-blame and impatience in order to produce good results for the child’s treatment. Parents should understand the manifestations of autism in children and take their children to the psychiatric clinic in time once they have similar symptoms.