Whether or not the stenosis can be recovered depends on the cause of the stenosis. If the stenosis is caused by external compression and there is no lesion in the endothelium, the stenosis can be restored to normal as long as the exogenous factors are removed. However, if the exogenous factors have already caused endothelial hyperplasia leading to luminal narrowing, the stenosis will not be recoverable even if the exogenous factors are removed. If the lumen is narrowed due to endothelial hyperplasia, the treatment needs to be chosen according to the severity, with mild stenosis being treated with medication and severe stenosis requiring surgery or intervention. For asymptomatic patients, when the arterial stenosis is less than 50%, only medications such as the antiplatelet drug aspirin and statin lipid-lowering drugs can be given. When the stenosis is more than 50% and there are corresponding symptoms, it is best to use surgical or interventional methods to rebuild blood flow; when the stenosis is more than 70%, it is recommended to actively treat and rebuild the blood flow regardless of whether or not there have been symptoms; feasible carotid endarterectomy, intracranial and extracranial vascular bypass grafting, carotid stenting, and so on. The purpose of the surgery is to eliminate atherosclerotic plaque, relieve arterial stenosis, prevent thrombosis or plaque dislodgement, and restore smooth blood flow in the carotid artery. To summarize, whether the stenosis can be restored or not is related to the cause of the disease. If endothelial lesions have already occurred, the restoration of blood flow and lumen shaping can be achieved through endothelial stripping, balloon dilatation, stent implantation and other methods.