Many people, especially those who are older, may experience sudden physical dysfunction, including paralysis on one side of the body, abnormal sensation on one side of the body, one eye suddenly a black, and then after a period of time and well …… this time must pay attention, no matter what there is nothing, must be checked in the hospital, never Think that the self-recovery is nothing, may be a time bomb has quietly opened, waiting for the detonation at any time. Transient ischemia is a temporary ischemia of the brain, causing dysfunction of the brain, retina, cochlea, etc., with few changes in consciousness (this is the reason why it is most easily ignored). The symptoms last for a few minutes and a few can last for several hours, but all recover completely within 24 hours without sequelae. The common ones can be divided into two categories: 1. Transient ischemia of the internal carotid artery system: sudden onset of transient hemiparesis and hemianesthesia, unilateral hand and facial involvement is common, and transient blindness or darkness in one eye may also occur. If the main hemisphere is involved, there is speech dysfunction, and transient loss of reading, writing and aphasia may occur. 2. Transient ischemia of the vertebrobasilar system: vertigo and isotropic hemianopia are the most common symptoms. Facial palsy, tinnitus and dysphagia can also be present. Headache, diplopia, and ataxia can also be the main complaint symptoms. There can be perioral sensory disturbances and memory impairment.