Stroke usually refers to cerebrovascular accident, generally has an acute onset, many patients have some early signals 1 to 2 days before the onset or a few hours before, at this time, if timely recognition, and active and effective treatment, most of them can make the patient turn to safety and prevent the occurrence and progress of stroke. The precursor symptoms of stroke mainly include the following: 1. Inadequate blood supply to brain tissue or bleeding that damages local functional areas may cause patients to suddenly have a distorted mouth and eyes, drooling, slurred speech, difficulty in spitting out words, inability to speak or understand other speech, choking on water, weakness or inflexibility of one limb, unstable walking or sudden fall, etc. 2. Insufficient blood supply to brain tissue or local tissue damage affects the sensory function of the brain, which may lead to numbness of the face, tongue, lips or limbs, and some patients may experience haziness in front of the eyes or have difficulty seeing things for a while, tinnitus or hearing changes. 3, consciousness disorders, performance of mental depression, always want to sleep or drowsy throughout the day. The personality is also uncharacteristic, suddenly becoming silent, indifferent, slow in action or talkative, and there may also be transient loss of consciousness, which is also related to cerebral ischemia. 4. Physical nerve dysfunction may cause general fatigue, weakness, sweating, low fever, chest tightness, palpitation or sudden eruption, vomiting, etc. The above symptoms may not be manifested in every patient, but as long as there are precursor symptoms appear, 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.