Generally, carotid occlusion does not heal on its own. However, carotid occlusion that occurs on one side of the carotid artery may have no obvious symptoms. Carotid occlusion on one side of the carotid artery, caused by the progression of carotid atherosclerotic plaque aggravation, is a slow process. Once the carotid artery is occluded, it is not possible to recanalize on its own, and blood cannot pass through the occluded carotid artery again, so it is not possible to heal itself. But also because this carotid occlusion is a slow progression over many years, the organism has adapted to this state by producing some compensatory neovascularization. And it can also supply blood to the brain through the carotid artery on the other side, so it is possible that patients do not have obvious symptoms. If the carotid artery is suddenly occluded due to cardiogenic embolism, the brain tissue in the carotid artery blood supply area will lead to large cerebral infarction because of the lack of a compensatory adaptation process, which may even cause the patient’s death. Therefore, when carotid artery occlusion occurs, it is recommended to go to a specialized outpatient clinic in a timely manner to assess the condition under the guidance of a doctor and give targeted treatment.