Carotid stenosis is a common cerebrovascular disease, which is mainly due to long-term blood lipid deposition, attached to the inner wall of the carotid artery, causing atherosclerosis, which gradually thickens and degrades the inner lining of the carotid artery, gradually forming plaque over time, blocking the lumen and causing stenosis of the carotid artery. Therefore, carotid artery stenosis usually occurs in middle-aged and elderly people, especially some three high people, high blood pressure, high blood pressure, high blood sugar, smoking and alcohol abuse are also risk factors, which may accelerate the occurrence of atherosclerosis and accelerate the formation of carotid artery stenosis. Carotid artery stenosis is still very dangerous, first of all, blood flow obstruction will cause cerebral ischemia, leading to a series of symptoms including dizziness, memory, disorientation, impaired consciousness, black haze, numbness and/or weakness of the lateral side and/or limbs, tongue extension bias, unfavorable speech, inability to understand what others say, etc. These need not be mentioned; what is more dangerous is that if the carotid plaque is unstable, the plaque will fall off and enter the brain with the What is more dangerous is that if the carotid plaque is unstable, it will detach and enter the brain with the blood flow, which will lead to acute cerebral infarction with serious consequences. Therefore, carotid artery stenosis should be treated in time, otherwise it is dangerous. What kind of carotid artery stenosis should be seen? For mild carotid artery stenosis, it is recommended to see a neurologist for conservative drug treatment, taking some anti-clotting and plaque stabilizing drugs, and the condition should be controlled; while for moderate to severe carotid artery stenosis, surgical treatment is required depending on the situation. The standard procedure for the treatment of carotid artery stenosis is generally recognized by the international medical community as carotid endarterectomy. Carotid endarterectomy treats moderate to severe carotid stenosis by removing the carotid plaque under a microscope, removing the root cause of the stenosis, and restoring the size of the carotid lumen, thereby restoring blood supply.