The doctor will first take a detailed medical history to see if the patient is over 50 years old, if he/she is obese, if he/she has family members who have had strokes, if he/she likes to smoke and drink, if he/she socializes a lot, if he/she likes a high-fat diet, if he/she does not like to exercise, if he/she snores, if he/she has chest tightness and dizziness, if he/she has been diagnosed with high blood pressure, diabetes, high blood cholesterol, high uric acid or heart disease. Fortunately, there are many tests that can help us to detect “hidden dangers” and “clues”. Physical examination and blood tests: to screen for hypertension or hypotension, hyperglycemia, hyperlipidemia, hyperuricemia, hyperhomocysteinemia, or hematologic disorders such as anemia and erythrocytosis; ultrasound and electrocardiogram: to determine whether a patient has congenital or acquired heart disease, such as valve defects or arrhythmias (e.g., atrial fibrillation); ultrasound of the neck vessels or vascular MRI: It can detect the presence of congenital or acquired vascular stenosis or plaque, arterial entrapment and other lesions, which is equivalent to checking the “pipes in the house”; CT or MRI of the head can help to detect early whether there are already lesions in the patient’s skull, which is equivalent to checking the “furniture in the house It is equivalent to checking whether the “furniture in the house” is safe and sound and whether it has been “stolen”. Since CT is relatively expensive and has a small amount of radiation, it is generally optional after consultation with a physician. For patients with suspicious symptoms and unknown causes, doctors may also choose some uncommon tests: thyroid function, AIDS, syphilis, tumor markers, autoimmune antibodies, which may leave patients “unaware”, not knowing that these diseases like to be associated with cerebrovascular disease ” These diseases like to “gang up” with cerebrovascular disease and “go together”, laying a great hidden danger. In short, the health department has not yet thought of a better way to curb the increasing morbidity and mortality of stroke than to popularize the scientific concept of healthy living and to open more stroke prevention and screening clinics as soon as possible. The significance of stroke screening and prevention is not to eliminate stroke, but to reduce the risk of stroke by popularizing health knowledge, promoting a healthy lifestyle, screening for stroke-related risk factors and intervening effectively to curb the current trend of rapid increase in the incidence of stroke and its younger onset in China. Deji Hospital is the first private hospital in Shanghai dedicated to this project and provides consultation and services in the Neurology Clinic and Brain Health Service Center every Monday to Friday. In conclusion: everything has its own cause and effect. Instead of spending a lot of money on stroke treatment, it is better to stay focused on stroke prevention.