Case Summary Baby K, 5 months old, does not gaze at mother, not easily made to laugh, cries. 2nd child, older child has autism, mother is very alert, see doctor. Baby L, over 3 years old, had been in kindergarten for a month, but the kindergarten teacher reacted repeatedly to the fact that she did not fit in, did not follow instructions, screamed, etc., so that she was rejected and the parents were forced to seek medical attention. The parents explained that the baby “is actually very smart, can recite many Tang poems, and has a personality.” After testing and evaluation, the doctor told Baby K that her mental development deviated from the normal trajectory; early intervention and regular monitoring were required. Baby L, preliminary diagnosis of autism, recommended rehabilitation and further improvement of examination. Autism, also known as autism spectrum disorder, is a group of psychological developmental disorders that begin in early childhood and are caused by abnormal neurodevelopment. As research on autism progresses, it is gradually recognized that autism is a widespread disorder of the central nervous system caused by a variety of environmental factors in response to certain genetic factors. Autism lacks specific treatment and has a poor prognosis, with 60-70% requiring lifelong care. Severe cases result in lifelong disability, while mild cases may develop mood disorders and antisocial behavior in adulthood, causing a huge economic and social burden. However, early detection, early intervention and early rehabilitation are still expected to result in better outcomes. Early warning Autism is caused by developmental disorders and starts before the age of three. Lack of attachment behavior, such as not being able to gaze eye-to-eye, not looking at the teaser when teased, not smiling, indifferent to the arrival or departure of the mother, not recognizing the baby, etc. 2.Over-sensitive to light and sound, indicating wiggling or peculiar finger movements. 3.The sound of whirring and learning is rare. 4.Sleep pattern is not easily established. 1. Lack of facial expressions, no corresponding posture when being hugged; often no response to name calling; cannot express their needs with eyes, gestures and postures. 2. Does not care about the surrounding children, likes to play alone; does not play play games. 3. Always play with toys in the same way, becoming a fixed pattern and not allowing others to change. 4. Repeatedly imitating others’ words, talking to themselves, repeatedly shouting for no reason, laughing for no reason or suddenly laughing. 5.Over-attachment to an object, the whole day does not want to let go, such as: a handkerchief. 6. Allergic or dull reaction to sound, light, pain, etc. For example: fear of sharp high notes, fear of light; injection does not cry, fall down does not scream, etc. 7. Meaningful speech that was already spoken before the age of one disappears gradually. Family countermeasures About 90% of children with autism show abnormal expressions within 24 months, and 50-60% appear within 12 months. Surveys show that the time gap between the onset of symptoms and parental concern is up to one year, and the time gap between the onset of parental concern and referral for evaluation is at least one year, with the onset of definite concern and help seeking mostly at or after age 2. Children are in a period of rapid growth and development in their early years, so it is important to monitor their developmental levels regularly and to intervene and rehabilitate them in a timely manner under the guidance of professionals once they are found to deviate from their normal trajectory, without getting hung up on the diagnosis and without taking chances. Autism is not easily diagnosed in the early stage, and some imaging tests and biochemical indicators are mainly used to exclude the differential diagnosis of organic diseases and lack specificity for the diagnosis of autism. It is possible to investigate the etiology of developmental disorders, but it is not necessary to wait for the results before treatment, because the etiology of autism is still on its way to be explored.