Stroke usually refers to cerebrovascular accidents, generally has a rapid onset, but many patients have some early signals 1 to 2 days or a few hours before the onset of the disease, at this time, if you can identify in time, and active and effective treatment, most of the patients can turn the crisis into peace, to prevent the occurrence and progress of stroke. The precursor symptoms of stroke are: 1. Suddenly the mouth and eyes are slanted, drooling, slurred speech, difficulty in spitting out words, incomprehensible speech or incomprehensible speech, choking on water, weakness or inflexibility of one limb, unstable walking or sudden fall. This is caused by insufficient blood supply to brain tissue or bleeding that damages local functional areas. Numbness of the face, tongue, lips or limbs, or transient haziness in front of the eyes or momentary difficulty in seeing, tinnitus or hearing changes. This is due to the lack of blood supply to the brain tissue or local tissue damage affecting the sensory function of the brain. 2. Disorders of consciousness, mental depression, sleepiness or drowsiness. The personality is also uncharacteristic, suddenly becoming silent, indifferent expression, slow action or talkative, and there may also be transient loss of consciousness, which is also related to cerebral ischemia. 3, general fatigue, weakness, sweating, low fever, chest tightness, palpitations or sudden eruption, vomiting, etc., which is a manifestation of vegetative nerve dysfunction. 4.Headache, generally a sense of distension, may have a stiffness in the neck, which is due to brain tissue injury after edema, etc. resulting in increased intracranial pressure. The above symptoms may not be present in every patient, but as long as there are precursor symptoms, especially in middle-aged and elderly people, they should be especially alert. At this time, the patient should be kept quiet, rest in bed, avoid mental tension, and be sent to the hospital for timely treatment.