The degree of carotid stenosis is clinically classified into three major categories according to mild, moderate and severe, so is carotid stenosis rate of 80% serious? Usually, when the stenosis rate is less than 50% medically defined as mild, and when the stenosis rate is between 50% and 70%, it is defined as medium, and patients at this stage are usually accompanied by obvious symptoms. When the stenosis rate is above 70%, it is considered severe. Therefore, patients with carotid stenosis of 80% are in critical condition, and medication is not effective at this time, so early surgery is recommended. Stenting is a common procedure for carotid stenosis, with the advantages of minimal trauma, short operation time and fast recovery. The disadvantages of stenting are twofold, one intraoperative and one postoperative. During the process of intraoperative stent placement, the plaque may fall off and form a cerebral embolism. In addition, after stenting, it is usually necessary to take medication for a long time to maintain it, and there is a possibility of reoccurrence of stenosis. Carotid endarterectomy is another procedure for treating carotid stenosis. The procedure is performed under a microscope and is safer. A 7-8 cm incision is made in the neck, then the outer wall of the carotid artery is incised and the diseased intima is peeled away to restore the smooth inner wall and normal internal diameter of the carotid artery. The procedure takes about 1-2 hours and the patient can return to normal life 1-2 days after the procedure. It can be seen that carotid endarterectomy has unique advantages in the treatment of carotid stenosis, so it is recommended that patients choose this procedure to help them recover as soon as possible after the diagnosis of their condition. Carotid artery stenosis can have very serious consequences if left untreated. First of all, she is prone to cause insufficient blood supply to the brain, and patients will experience dizziness, drowsiness, lack of memory and tinnitus; secondly, it will affect patients’ cognitive function and visual impairment, leading to a serious reduction in memory and transient vision loss. There is also a very dangerous situation, which is to cause cerebral infarction, resulting in hemiplegia or even death.