Bilateral widening of the frontotemporal extracerebral space requires a CT scan, mostly considered due to a small amount of subdural fluid, and in small children, peripheral hydrocephalus may have to be considered. The main cause may be due to poor circulation of cerebrospinal fluid, but it can also be due to infection and may be caused by hypoxic-ischemic encephalopathy. A high degree of suspicion for cerebral hypoplasia is needed, but it also depends on what clinical symptoms the child is experiencing. If there are no clinical symptoms, we can continue to observe. The main feature of congenital hydrocephalus is the progressive increase of head circumference, which usually starts to increase in the first few weeks or months after birth, or is obviously larger than normal at birth, but it is not necessarily a problem. The severity of the disease mainly depends on how much widening has occurred and whether it is particularly large. Generally, it does not affect the growth and development of the child, and will be absorbed as the child grows older, so do not worry too much. Therefore, it is recommended to go to the hospital for regular review and also observe the changes in the baby. If the child has no consciousness disorder, no recurrent convulsions, and no abnormal growth and development, don’t worry too much. Furthermore, babies have a great capacity for regeneration and molding, so they need to be dynamically observed and regularly rechecked in the hospital.