The symptoms of carotid plaque are related to the severity of the disease. Mild carotid plaque does not have any clinical symptoms. When carotid plaque causes severe narrowing of the carotid artery or occlusion of the carotid artery, it may cause dizziness, headache and other symptoms of brain tissue ischemia due to low perfusion of intracranial blood flow. Or when carotid plaque ruptures, resulting in the dislodgement of emboli and embolism of intracranial arteries, it can cause the corresponding symptoms of cerebral infarction. Carotid plaque is the plaque attached to the inner wall of the carotid artery vessels, mostly found at the bifurcation of the common carotid artery. The presence of carotid plaque indicates the presence of carotid atherosclerosis. Carotid plaques are more common in patients with advanced age (>60 years), obesity, smoking, hypertension, hyperlipidemia and diabetes. If the plaque causes carotid artery stenosis greater than 70%, it will cause intracranial hypoperfusion, which will have a significant impact on the brain blood supply and needs to be treated aggressively. Carotid plaque is divided into hard plaque and soft plaque. Hard plaque has been calcified, generally more stable, not easy to fall off and rupture, but easy to cause carotid artery stenosis. Soft plaque is easy to rupture and form embolus, causing cerebral embolism. If the embolism area is small, it can manifest as dizziness, blackness in front of the eyes, blurred vision and movement disorder, etc. If the embolism area is large, it can cause hemiplegia, aphasia, coma and even death. Carotid plaque does not show obvious symptoms in early stage, and most people find carotid plaque through carotid ultrasound during physical examination.