Carotid artery stenosis should be considered if the examination reveals a stenosis and the following conditions are met: 1. Those with symptoms, such as dizziness, headache, recurrent transient ischemic attacks, limb weakness, etc., and carotid artery stenosis up to ≥50% should be considered for surgery. 2.Asymptomatic people (such as those found during physical examination) with carotid stenosis up to ≥70% should consider surgery. 3.If the plaque has ulceration, bleeding or soft plaque (unstable plaque), or if it shows recurrent transient ischemic attack (TIA) or cerebral infarction or luminal infarction, surgery should be considered. In addition, we also need to note: 1, people with frequent minor strokes (transient ischemic attack, TIA), except other factors as long as the presence of carotid atherosclerotic plaque, stenosis rate of the above criteria should be actively prevented. 2.Patients who have had a minor stroke or have had a stroke but have recovered well if they have carotid artery stenosis. Within 3-4 years after the first stroke, 20%-45% will develop complete stroke (hemiplegia, aphasia, hemianesthesia and other neurological damage symptoms). Repair treatment should be actively carried out. 3.The examination reveals uneven surface and texture of carotid arteriosclerosis plaque, or ulcer or bleeding inside the plaque should be highly alert, especially if the latter two are present, even if the stenosis is not particularly heavy, repair should be considered for prevention. 4. Of course, basic physical conditions should also be present. If the carotid artery has been completely occluded or there has been irreversible severe stroke carotid stenosis, to some extent, surgical repair is lost.