Stenosis of the cerebral artery depends on whether the stenosis is of a main vessel or a stenosis of a penetrating vessel, along with the degree of stenosis. If the stenosis of the cerebral artery is a stenosis of a main vessel, such as the middle cerebral artery or the basilar artery, with stenosis >75% or even up to 90%, in this case, the patient can undergo invasive treatment options such as endothelial debridement for embolization or stenting. If the patient’s arterial stenosis does not exceed 75%, conservative treatment can be taken, and the patient is advised to take regular oral statins to lower lipids and protect the intima. Regular monitoring of liver function and blood lipids is recommended during oral medication. If the stenosis of the cerebral arteries is a lesion of a penetrating vessel, it is generally not a big problem because the blood vessels in the brain belong to a Willis ring and can compensate for it. However, patients are advised to quit smoking and limit alcohol as much as possible, and to eat a low-salt and low-fat diet to avoid risk factors that can aggravate atherosclerosis.