X-rays are categorized into plain radiography and CT. The function of children’s head X-ray is to observe whether there are abnormalities in the morphology of the skull and abnormalities in the brain parenchyma inside the skull. 1. Ordinary X-ray examination: ordinary X-ray examination is mainly used to observe whether there are abnormalities in the shape, structure and density of the skull, and through some special photographic positions, it can observe the special manifestations of some subtle structures, such as mastoid process, inner ear and so on. It is used to observe whether there is any abnormal calcification in the brain structure and other manifestations. 2. CT examination: CT, as a kind of tomography, mainly observes the abnormal performance of intracranial parenchyma, including the morphology of ventricles and brain pools, as well as the density of brain tissues, etc. It can not only observe the abnormal performance of the skull, but also observe the abnormal performance of the brain. It can not only observe the abnormal manifestations of the skull, but also observe the abnormalities of the sinuses, eyes, nose, and the fine structure of the ears. In order to detect intracranial diseases in a timely manner, it is recommended that a proper head examination be performed under the advice of a physician, and that regular treatment be carried out as soon as it is detected.