The carotid artery is an important lifeline that carries blood to the brain. Only by keeping it open at all times can the tissues of the brain receive fresh blood and function normally. As the lifeblood of the brain, the carotid artery is of great importance. However, after the development of sclerotic plaque, the passage is blocked, and over time, the lumen will gradually become narrowed, forming carotid stenosis. The degree of carotid artery stenosis varies from superficial to deep, and when the stenosis rate reaches 100%, carotid occlusion occurs, which can be unilateral or bilateral. Some people who develop right-sided occlusion of the carotid artery often ask if right-sided occlusion of the carotid artery is life-threatening. Right-sided occlusion of the carotid artery can be life-threatening, and timely treatment is necessary to reduce the risk of further occlusion. Carotid artery stenosis should not be treated carelessly, as it can have serious consequences. If one side of the carotid artery is occluded, the brain will have obvious symptoms of ischemia, and patients will often feel dizzy and weak, tinnitus, vertigo, dizziness, blurred vision, memory loss, drowsiness, and dreaminess. It can also trigger transient ischemic attacks, resulting in transient local neurological dysfunction, which is generally transient and reversible and usually recovers within 24 hours after onset, with no aura of onset and no sequelae after recovery. Carotid stenosis may also trigger ischemic stroke, which usually manifests as sensory impairment in one limb, hemiparesis, aphasia, cerebral nerve damage, and, in severe cases, coma. There is also a condition that may often cause acute cerebral infarction due to the dislodgement of carotid plaque, which enters the brain with the blood flow and blocks the distal arteries, which is very dangerous. Therefore, when a carotid artery occlusion occurs, it is important to go to a regular hospital for stent intervention or carotid endarterectomy treatment in a timely manner. The specific choice of treatment needs to be decided according to the actual situation of the patient. It is important to note that there is a risk of thrombus dislodgement during stent intervention, and long-term medication is required after the procedure. Carotid endarterectomy is effective in removing plaque, restoring the normal size of the lumen, and restoring normal blood flow, and does not require medication after the procedure. Carotid endarterectomy treats carotid artery stenosis, restores normal blood supply to the brain, and prevents cerebral infarction. For patients with carotid artery occlusion, treatment is performed by intracranial and extracranial vascular bypass grafting.