Slow blood flow in Doppler examination is considered to be the existence of cerebral blood supply insufficiency. If there are arterial plaques in the blood vessels in the early stage, it is necessary to take medication such as clopidogrel and atorvastatin according to the doctor’s prescription; if the slow blood flow is obvious and other examinations suggest that the blood vessels are severely narrowed, this situation may require interventional therapy. Doppler examination suggests slow blood flow, suggesting the existence of local cerebral blood supply insufficiency, but to determine the condition of blood vessels, magnetic resonance or cerebral angiography is needed to clarify. 1. If the lesion is mild, anti-platelet aggregation, lipid-lowering and plaque stabilization, and improvement of cerebral circulation can be given as medication, such as aspirin, clopidogrel, atorvastatin, and nicergoline tablets. 2. If severe stenosis causes obvious clinical symptoms or even cerebral infarction, interventional therapy, such as local implantation of stents, is needed, and the above medications need to be strengthened after the operation. 3. In addition to medication, patients should pay attention to low-salt and low-fat diet, improve bad habits, quit smoking and drinking, sleep on time, exercise properly, control weight, and control blood pressure, blood lipid and blood sugar. It is recommended that patients seek timely medical treatment, standardized treatment under the guidance of the doctor.