Cerebral infarction can occur in any part of the brain, the mechanism of cerebral infarction is mainly related to atherosclerosis leading to thickening of blood vessels, lumen narrowing and thrombus formation, as well as atrial cardiogenic embolus dislodgement is also a risk factor for cerebral infarction, and the formation of a variety of sites. If the internal carotid artery system is occluded, it usually manifests as infarction of one side of the cerebral hemisphere, hemiplegia and hemiplegia of the opposite side of the limbs, and aphasia will occur if the dominant hemisphere is involved. In the case of middle cerebral artery infarction, there will be hemiparesis of the opposite limb, hemiplegia, hemiplegia, and insomnia in the dominant hemisphere, and both eyes may be staring like the side of the lesion. In the case of nasal congestion of the posterior cerebral artery, the main clinical manifestations are dizziness, headache, and hemiparesis of the limbs.