Carotid atherosclerosis has nothing to do with sleeping position. It is enough to control diet, pay attention to observation and regular review. Carotid atherosclerosis is a progressive atherosclerotic lesion of the carotid arteries under the combined influence of ageing, abnormalities of sugar and lipid metabolism, smoking, hypertension and other factors. The accumulation of plaque in carotid atherosclerosis may narrow or even block the carotid arteries, which can lead to stroke, transient ischemic attack and other emergencies. There is no specific way to prevent carotid atherosclerosis, and maintaining a good lifestyle can reduce the incidence. It mainly includes quitting smoking and avoiding passive smoking, limiting alcohol consumption, and actively controlling risk factors such as hypertension, diabetes, hyperlipidemia and obesity. Attention should also be paid to scientific diet, increasing moderate-intensity exercise, maintaining a good state of mind, and keeping waist circumference and weight within the ideal range. Pay attention to regular review in the hospital and follow the doctor’s instructions for standardized treatment.