First, the aura symptoms of cerebral infarction patients mostly in quiet rest onset, some patients wake up with a start, found that the mouth and eyes skewed, hemiplegia, drooling, eating off the rice grains, can not lift the chopsticks, which is the occurrence of cerebral infarction, often catching people off guard. Only some patients have numbness of the limbs before the onset of the disease, unclear speech, transient blackness, dizziness or vertigo, nausea, blood pressure fluctuations (can be higher or lower) and other transient symptoms of cerebral ischemia. These aura symptoms are generally very mild, short-lived, and often overlooked. Clinical manifestations The infarction site and infarction area are different, and the most likely manifestations are as follows: 1. Sudden onset of disease, often during quiet rest or sleep. The onset of the disease reaches its peak in a few hours or days. 2, headache, vertigo, tinnitus, hemiplegia, can be a single limb or one side of the limb, can be the upper limb is heavier than the lower limb or the lower limb is heavier than the upper limb, and there is difficulty in swallowing, slurred speech, nausea, vomiting and other conditions, and the serious cases are soon comatose. Each patient can have several of the above clinical manifestations. 3, the significance of brain CT examination: brain CT examination shows the size and location of cerebral infarction lesions with an accuracy rate of 66.5%~89.2%, and shows the accuracy rate of initial cerebral hemorrhage 100%. Therefore, early CT examination can help differential diagnosis and exclude lesions such as cerebral hemorrhage. It is very important that the treatment of cerebral hemorrhage and cerebral thrombosis in the early stage of onset is very different. When the onset of cerebral infarction is within 24 hours, or when the infarct is small, or when the lesion is at the brainstem and cerebellum, CT brain examination often does not provide a correct diagnosis. If necessary, it should be reviewed within a short period of time to avoid delay in treatment. 4. Patients with lacunar cerebral infarction can be asymptomatic or have mild symptoms, and the disease is found by CT examination of the brain due to other diseases, and some of them are already obsolete lesions. This kind of situation is common in the elderly, and the patients are often accompanied by hypertension, atherosclerosis, hyperlipidemia, coronary heart disease, diabetes mellitus and other chronic diseases. Cavernous cerebral infarction can recur, some patients eventually develop into symptomatic cerebral infarction, and some patients have stable condition for many years. Therefore, we should pay attention to “asymptomatic stroke” in the elderly and take a positive attitude in prevention. Cerebral infarction should be treated as early as possible and in a timely manner. Although it is not as dangerous as cerebral hemorrhage, most of the patients are old and weak, with many chronic diseases, and there are many cases of cautious use of medication in treatment, plus the infarcted area can be enlarged in a short period of time, and many comorbidities can occur, therefore, the death rate of cerebral infarction is also relatively high, and the rate of invalidity is higher than that of cerebral hemorrhage. The principle of treatment is mainly to improve cerebral circulation, prevent cerebral edema, and treat comorbidities.