中风发作往往突如其来，猝不及防。然而临床观察发现，在暴风骤雨般的中风发作之前，病人常会出现一些先兆症状。这些先兆症状大多比较轻微，或一闪而过，来去匆匆，容易被病人忽视。如果病人或其家属能掌握一些相关知识，善于识别这些先兆症状，抓住中风发作前的“蛛丝马 Stroke episodes are often sudden, caught off guard. However, clinical observations have found that patients often have some aura symptoms before a stormy stroke. Most of these aura symptoms are relatively mild, or flash, come and gone, easily overlooked by the patient. If the patient  or their relatives  be able to master some relevant knowledge, be good at identifying these aura symptoms, catch the stroke before the "corsairs