Cerebral infarction is now called cerebral infarction, also known as ischemic stroke, is a clinical syndrome in which the blood supply to the brain is impaired due to various causes, resulting in local ischemia and hypoxic necrosis of brain tissue and corresponding neurological deficits. 1.Complete anterior circulation infarction: it is characterized by impairment of higher neural activities of the brain (consciousness, speech, calculation, spatial orientation, etc.), partial blindness of visual field, weakness and unfavorable activities of upper and lower limbs on the opposite side of the lesion. 2.Partial anterior circulation infarction: clinical symptoms mostly show different combinations of paralysis of the lateral limb, hemianopia and hemianesthesia, and the lesion is mostly limited to the unilateral upper or lower limb. 3.Posterior circulation infarction: it manifests as vertebrobasilar artery syndrome, such as vertigo, balance disorder, abnormal eye movement, visual double vision or tetraplegia, etc. 4.Lacunar cerebral infarction: manifested as various lacunar syndromes, such as simple limb mild hemiparesis without sensory disorder; or simple limb sensory loss or numbness, pain and discomfort; or speech disorder, facial palsy, balance disorder, etc. In summary, the symptoms of cerebral infarction are diverse, often manifesting as limb paralysis, sensory impairment, unfavorable speech, facial palsy, etc. If the above symptoms appear, patients should seek timely medical consultation for timely and effective treatment to save brain function.