Sudden onset of dysphasia is considered to be caused by cerebrovascular disease, which may be caused by cerebral infarction or minor cerebral hemorrhage, and it is necessary to consult the emergency department or neurology department of the hospital at the first time to improve the head CT examination quickly. If a high-density shadow is seen on CT of the head, brain hemorrhage should be considered. In the acute stage, dehydration should be given to lower cranial pressure, prevent further bleeding, and reduce neurological deficits. If no high-density shadow is seen on CT, cerebral ischemia is considered, and there may be cerebral infarction that is not yet visible on CT. The patient can be given antiplatelet aggregation or fibrinolytic therapy to recanalize the blocked blood vessels and improve the symptoms of neurological deficits and clumsy speech.