The severity of left carotid atherosclerotic plaque is related to the presence or absence of symptoms, if the left carotid atherosclerosis leads to carotid artery stenosis or unstable plaque rupture, accompanied by clinical symptoms, this situation is more serious. The left carotid atherosclerotic plaque is generally not serious, the pathological changes of this disease progress slowly, if the patient in the early positive control of risk factors lesions can be partially subsided. Carotid atherosclerosis plaque will gradually accumulate, may make the carotid artery narrowing or even blockage, or unstable plaque rupture, easy to involve the brain tissue and ultimately lead to serious consequences, such as stroke, transient ischemic attack and other emergencies, this situation of the left carotid atherosclerotic plaque is more serious. Patients with left carotid atherosclerotic plaque should quit smoking and limit alcohol, control their weight, maintain a positive and optimistic mindset, take medication as prescribed by the doctor on time, and go to the hospital for regular follow-ups, and if any other discomfort occurs, they should inform the doctor in time to avoid any adverse effects.