The precursors of stroke include motor dysfunction, speech dysfunction, altered consciousness, sensory abnormalities and so on. Specific analysis is as follows: 1. Motor dysfunction: It is mainly manifested as one side of the face or upper and lower limbs with weakened muscle power, no domination, crooked corners of the mouth, salivation, difficulty in swallowing, or one side of the limbs with weakness, inability to lift the arms, sudden dropping of objects in the hands, dragging one foot on the ground when walking, or even inability to stand and walk, and so on. 2. Speech dysfunction: this is the most common aura symptom before stroke, which is mainly manifested as unfavorable speech, unclear speech, difficulty in spitting out words, aphasia, or inability to express the meaning of words, and so on. 3. Alteration of consciousness: It is manifested as mental depression, always wanting to sleep or drowsiness all day long, and many patients will yawn frequently, which is caused by ischemic and hypoxic state of brain tissues. 4. Sensory abnormalities: Before stroke, patients often have a numbness of the tongue, lips or limbs, sometimes accompanied by tinnitus and hearing loss. When the above symptoms occur, it is recommended to consult a doctor in time, have a comprehensive examination, make a clear diagnosis, standardize the treatment under the guidance of a physician, and do not use medication on your own, so as not to cause serious adverse consequences.