Increased cerebral blood flow velocity, which is dangerous and mostly found on transcranial Doppler, and increased blood flow velocity are mainly seen in cerebral atherosclerosis and arterial stenosis, which are mostly seen in the elderly in population distribution. Patients often have a past history of hypertension, diabetes mellitus, hyperlipidemia, hyperuricemia, hyperhomocysteinemia and other underlying medical conditions, and common clinical manifestations may include dizziness, headache, fatigue, drowsiness, etc. Some patients may also have no special manifestations, and are occasionally found during physical examination. Small arteriosclerosis and vascular stenosis, if not controlled in time, with the development of time can appear cerebral infarction and other diseases, the emergence of cerebral blood flow increase is a certain risk. In this case, we should pay attention to rest, avoid mental stress, eat a light diet, eat more fruits and vegetables, avoid eating big fish and meat, pay attention to controlling blood lipids, blood sugar and blood pressure, and patients who smoke and drink should quit smoking and drinking as soon as possible.