If there is a precursor to a stroke, you can have a checkup of the risk factors for cerebrovascular disease, such as blood pressure, blood glucose level, electrocardiogram, blood lipids, carotid ultrasound and so on. At the same time, you should pay attention to controlling your own weight and stop smoking and drinking. The above tests mainly identify the preventable risk factors for cerebrovascular disease. Hypertension is the most important preventable risk factor, and controlling blood pressure can effectively reduce the risk of cerebrovascular disease. Patients with diabetes mellitus and hyperlipidemia should also have their blood glucose and lipid control checked continuously, as higher levels of these two indicators will accelerate the progression of cerebrovascular stenosis. Carotid ultrasound is mainly to clarify whether the patient has carotid artery stenosis, carotid artery stenosis greater than 50% of the patients will increase the incidence of stroke. Patients with carotid artery stenosis greater than 50% have a higher incidence of stroke. When the symptoms of stroke precursors appear, it is necessary to go to the hospital as soon as possible for the relevant examination, and under the guidance of neurologists to intervene in order to reduce the risk of later onset of stroke.