Persistent intracranial murmur, a persistent murmur like the roar of a machine, aggravated by heart contraction, often interfering with sleep, can be heard in the frontal area with a stethoscope, and the murmur diminishes or disappears when the affected common carotid artery is compressed with a finger. Fractures at the base of the skull can cause injury to the cavernous sinus segment of the internal carotid artery or its branches, or direct injury to the artery from firearm injury or sharp force injury, or rupture of the wall of the internal carotid artery in the sinus segment from the violent turbulent blood flow during trauma. These factors can also cause punctate hemorrhage or limited injury to the arterial wall and later rupture of the cavernous sinus segment due to violent fluctuations in blood pressure. So, what tests should be done in patients with persistent intracranial murmur caused by intracranial fracture? The following is a brief introduction: 1. The posterior nasopharyngeal soft tissue thickness often exceeds 15 mm and is most obvious 12 to 24 hours after the injury. 2.The positive rate of X-ray examination is only 50%. 3, CT layer thickness and layer spacing selected at 3mm and 2mm scan conditions respectively can improve the diagnostic rate of CT flat scan, high resolution CT coronal scan and CT 3D reconstruction can progress a improve the detection rate. 4.Intracranial pneumothorax.