What are the symptoms of carotid artery stenosis 50%? Carotid artery stenosis is a common cerebrovascular disease, and the most common group is middle-aged and elderly people. Carotid artery stenosis is mainly caused by atherosclerosis, which leads to intimal lesions and hyperplasia of the arteries. It even forms plaque and blocks the lumen of the carotid artery, causing carotid artery stenosis. The carotid artery is an important channel for transporting blood from the heart to the head, and once the carotid artery is blocked, the consequences are very serious. In mild cases, symptoms such as dizziness, weakness and drowsiness may occur, and in severe cases, cerebral ischemia or acute cerebral infarction may occur. Carotid artery stenosis of 50% already belongs to moderate carotid artery stenosis, which should be treated as soon as possible. Mild carotid artery stenosis can be controlled by medication, plus maintaining good lifestyle habits and regular review of the disease development. For moderate and severe carotid stenosis, surgical intervention is required. At present, the ideal procedure to treat carotid stenosis is carotid endarterectomy. Carotid endarterectomy is performed under a microscope to remove the diseased carotid artery lining and smooth the inner wall of the carotid artery, restoring the internal diameter to its normal size. The procedure is very safe and the patient does not experience any pain.