Many people do not understand the various precursors of stroke, even if these stroke precursors appear, they all do not think or do not notice, from the perspective of stroke prevention, which is a great regret, a large number of clinical experience has proved that only a few patients do not have any signs before the stroke, the vast majority of patients have a variety of signals issued by the performance of instantaneous ischemia of the brain. 1. Dizziness. The precursor of stroke in middle-aged and elderly people will repeatedly appear momentary dizziness, suddenly feeling dizzy and dizzy, seeing things rotate, and then return to normal after a few seconds, which may be transient cerebral ischemic attack, commonly known as the precursor of stroke, and should be diagnosed and treated early to prevent the occurrence of stroke. 2. Numbness of limbs. In addition to cervical spondylosis, diabetes, if there are symptoms such as headache, vertigo, light-headedness, tongue swelling, or a history of hypertension, hyperlipidemia, diabetes or cerebral arteriosclerosis, etc., more attention should be paid to alert the occurrence of stroke, sudden onset or unilateral limb weakness, unstable standing, soon after remission and then attack to beware. 3. Sudden darkening of the eye. This is the most common symptom of stroke aura in middle-aged and elderly people, which is due to retinal ischemia caused by cerebral ischemia. Another sign of stroke is recurrent attacks, vertigo and vomiting, narrowing of visual field or double vision. 4. Falls of unknown origin. Due to cerebral vascular sclerosis, cerebral ischemia and motor nerve failure, ataxia and balance disorder can occur, and falls can easily occur, which is also a symptom of stroke aura. 5. Slurred speech. Insufficient blood supply to the brain, the body’s motor nerve failure, one of the common symptoms is a sudden speech or slurred speech, or even can not speak, but the duration is short, up to 24 hours, should be paid attention to, as well as unexplained crooked corners of the mouth, slurred speech or tongue extension oblique should be noted. 6. Yawning constantly. If there is no fatigue, lack of sleep and other reasons, there is continuous yawning, which may be due to cerebral arteriosclerosis, ischemia, causing chronic ischemia and hypoxia of brain tissue, which is a precursor of stroke patients.