Babies with the following conditions should be seen by a doctor and followed up regularly Risk factors, very poor limb movement after birth, very weak cry, no oral abnormalities, but difficult to breastfeed or poor sucking, children with poor sleep, those who have convulsions shortly after birth, low birth weight, those with abnormal CT findings after birth. Children who have been in the incubator for two weeks have a high likelihood of brain injury and must be followed for a long period of time, and if there are convulsions in the incubator they can be 100% suspected of having a brain injury. Can not see high-risk factors, but the physiological weight loss in more than a week, need to follow up The appearance of the appearance of dementia, audio-visual disorders, there are three major factors of low birth weight, asphyxia, pathologic jaundice, four months have not set the neck (vertical head instability), add the difficulty of complementary food, suspected swallowing difficulties, obvious oblique neck, poor improvement, no response to sound, do not smile (3-4 months laugh not sound) to rule out the developmental iliac joints anomalies, abnormal separation of the legs.