Carotid artery stenosis is mainly caused by atherosclerosis. When life is affected by some bad habits and high blood sugar, high blood pressure and high blood lipid, it will aggravate the formation and development of atherosclerosis, and over time, it will lead to carotid artery intima proliferation, degeneration, ulceration, calcification, etc., and even the formation of plaque blocking the carotid artery lumen, causing the stenosis of carotid artery. After the carotid artery intima becomes degenerated, it is easy to fall off or to form a thrombus in the ulcer. Therefore, it is important to pay great attention to carotid stenosis and take treatment measures as soon as possible. For the treatment of carotid artery stenosis, there are currently two medical treatments, one is medication and the other is surgical treatment. Among them, drugs can only treat mild carotid artery stenosis, while the more effective surgical treatment is carotid endarterectomy. However, many patients are not familiar with the conditions in which carotid artery blockage can be treated with medication. When is surgery necessary? Generally speaking, the specific treatment of carotid artery stenosis is determined by the degree of stenosis of the patient. Otherwise there are risks. Carotid endarterectomy is currently recognized as the standard procedure for the treatment of carotid artery stenosis. This procedure allows for the direct removal of carotid plaque and the diseased intima, restoring the smoothness and integrity of the carotid artery wall and the normal size of the internal diameter. The procedure is performed under a microscope and is very safe, with small incisions and rapid postoperative recovery, making it a very advanced technique.