Stroke precursors generally refer to the performance before and early in the onset of stroke, and the common symptoms include language disorders, visual abnormalities, consciousness disorders, sensory abnormalities, motor disorders and other manifestations. 1. Language disorder: it mainly manifests as unfavorable language, slurred speech, difficulty in spitting out words, aphasia, or even inability to express one’s own meaning. 2. Visual abnormality: it can be manifested as transient black haze, but often can be recovered after a few seconds. 3. Disorders of consciousness: often manifested as mental depression, feeling sleepy and drowsy, and some may even have loss of consciousness. 4. Sensory abnormalities: there is numbness on one side of the tongue, face, limbs, sometimes accompanied by tinnitus, hearing loss, vision rotation, unsteadiness, etc. 5. Motor disorder: the most important manifestations are crooked mouth, salivation, lack of strength of one side of the limbs, inability to lift the arm, unsteady gait, or even inability to stand, and sudden loss of strength and fall. When the patient has the above symptoms, need to pay attention to, timely medical treatment, so as to avoid delaying the condition.