Symptoms of autism in 19-month-old babies can be manifested as reluctance to approach loved ones, late speech, and some stereotyped and rigid behaviors. The pathogenesis of baby autism is unclear, and it is hypothesized that it may be caused by metabolic abnormalities that produce toxic intermediate metabolites that affect brain function. Clinical diagnosis is mostly based on its triad: 1. Social interaction disorders: not easy to approach people, when breastfeeding in the mother’s arms, the body does not stick close to the adults, and when the parents reach out to hug, there is no reaction of anticipation of being hugged. 2. impaired speech development: late speech, incoherent wording, and unintelligible speech. 3. Narrow range of interests: as well as stereotyped, rigid behavior, a monotonous action over and over again, refusing to change, and even self-injury, self-mutilation behavior. When children have the above three aspects of the performance should be considered whether the autism. Baby autism must be diagnosed by a pediatrician and cannot be asserted.