Autism, also known as autism, usually occurs in children before the age of 3. There is no cure for autism at present. Autistic children should be found and treated as soon as possible, and the sooner the effect is better. Through early intervention and treatment, rehabilitation training, humanistic care and so on. Children's various functions can be partially or completely restored. For people with severe symptoms, although after a series of treatments, the symptoms still cannot be significantly improved. It is necessary to persist in long-term treatment and closely observe the development of the disease in order to achieve the expected therapeutic effect.

The causes of autism are very complicated, mainly genetic factors, which are the result of the interaction between genetic factors and environmental factors. Some scholars have discussed the relationship between heavy metals, air pollution and autism, but the research has not yet reached a consistent conclusion.

Studies have shown that the brain structure and function of autistic children are abnormal. Some autistic patients have cerebellar dysplasia, brain stem atrophy, amygdala atrophy, corpus callosum atrophy, hippocampus atrophy, lateral cingulate gyrus atrophy, early brain volume increase and so on.