Whether the 9.2*2.6mm plaque of the left common carotid artery is serious or not is related to the type of plaque, if it is a soft plaque, the condition is relatively serious, and the condition of hard plaque is relatively mild. Plaque in the left common carotid artery is mainly assessed by the type of plaque to assess the risk, although large plaques are prone to stenosis and the risk of embolism, but small plates are also prone to cerebral infarction if they are unstable, to understand the occurrence of plaques are soft plaques or hard plaques. Soft plaques are relatively unstable and prone to rupture under the impact of blood flow, and fragments of ruptured plaques will block the cerebral blood vessels, leading to the occurrence of cerebral embolism; hard plaques are relatively more stable, with a relatively low risk of rupture, and the risk of cerebral embolism is lower than that of soft plaques. Patients with arterial plaques should be evaluated for the nature of the hemiplaque, as well as the patient’s risk of cerebral embolism, and risk factors should be controlled and treated under the guidance of a physician.