There are many kinds of characteristics of autism in babies, such as loneliness and disassociation, language communication disorder, narrow range of interests, stereotyped movements and behaviors, and so on. 1. Social communication disorder: if the baby has autism, he/she may show the characteristics of social communication disorder. The baby will mainly show that he/she likes to be alone, does not refuse but will not socialize with others, and immerses himself/herself in his/her own world, etc. This may prevent the baby from establishing normal interpersonal relationship with other people. 2. Language communication disorders: some autistic babies may have language disorders, such as late language development, regression of language after normal development, etc. In serious cases, babies may lose the function of language. 3. Narrow range of interests and stereotyped behavior: If the baby suffers from autism, stereotyped behavior may also occur, for example, the baby may be obsessed with a certain object and attached to it, and the baby may also suffer from intense obsessive-compulsive disorder, etc. If the baby suffers from the above autism characteristics, the baby may also suffer from stereotyped behavior. If your baby has any of the above autism symptoms, it is recommended that you go to the hospital for a comprehensive examination and proper treatment under the doctor’s judgment, so as not to affect your baby’s normal development and normal life.