Infant temples usually fill in around 18 months, but because of individual differences, the exact timing cannot be generalized. Infant temples can be full in about 18 months. If the temples are slightly sunken, it is usually a normal physiological phenomenon, because the baby’s hilarium is not completely closed, and the head shape is not fixed, so the baby’s head shape will gradually change with the growth of the later period, and if there is no other adverse reaction, there is no need to do special treatment. In addition, if the infant’s skull is defective and the sunken temples are more serious, it is recommended to go to the hospital for a relevant cranial CT examination, so as to avoid the occurrence of cranial defects, abnormal bone development and other conditions. It is recommended that parents should closely observe the development of their newborns, and go to the hospital in time if there are abnormalities in the development of the skull.