Autism, also known as autism, is a group of neuropsychiatric disorders of childhood. The day-to-day causes and pathogenesis are not well understood, and many studies suggest that it is related to genetic factors, brain development disorders and congenital factors such as embryonic infections. The causes of autism and the hazards of autism in children are not clear. The causes of autism 1, metabolic diseases: some congenital metabolic disorders can cause brain cell dysfunctions and disorders, which may affect the neurological transmission function of the brain, and then lead to autism. 2, living environment factors: children are in the period of growth and development, more sensitive to the living environment. Long-term living in a monotonous environment, without relevant knowledge and education, will not be interested in other things in the outside world, which will also lead to the generation of autism. 3, family genetic factors: According to survey data, 20% of children with autism, its family can be found in low intelligence, language impairment lights similar to autism symptoms. In addition, about 10% of boys with autism have chromosomal fragility disorder, so autism is with certain genetic factors included. 4, during pregnancy: fetal brain damage of varying degrees: such as 1-3 months of pregnancy, for some reason need to protect the fetus using excessive drugs; or influenza viral infection, and the fever does not go away; or correction of fetal position, cesarean section or the use of forceps to assist delivery; and such as distress abortion, premature birth, obstructed labor, etc. more likely to affect the child’s brain development. Special reminder to parents and friends, autism, if not treated in a timely manner, will allow the child to live in their own little world, unable to contact with the outside world, and in serious cases there may be self-injury or injury, which will affect the well-being of the child’s life. Parents must pay attention to the discovery of autism, should be timely to the regular professional hospital autism treatment, so as not to miss the best treatment period, to the child’s future lay hidden dangers. The autistic child has a narrow range of interests and is extremely preoccupied with certain objects, or is particularly interested in certain parts of objects or objects of a particular shape. 2. It is an important cause of mental disability in human beings, causing great suffering to the families of sufferers and imposing a heavy burden on families and society. 3. Affecting neurological functions: Studies have shown that autism is a disorder that, once it develops, the child’s neurological perfection comes to a halt. If found in time, early educational rehabilitation intervention, then neurological function recovery will be good, showing little difference from normal children. 4. Autism can make the child unable to grasp intonation, unable to change word meanings, reversal of pronouns, unclear concepts of affirmation and negation, etc. Warm tip: If your child is found to have autism, please get treatment in time, because once you miss the best time, autism will be very difficult to treat, if the child is past is 6 years old, autism treatment will become difficult, so please parents seize the opportunity.