Patients with cerebral infarction who do not recognize people indicate that their consciousness is affected, and most patients can recover their symptoms after active treatment. For example, if the brainstem superior reticular activation system is affected, it will lead to impaired consciousness, and the infarction in the frontal lobe and hippocampus will easily lead to cognitive decline and unrecognition. After active treatment, the patient’s cerebral blood circulation is improved, and a certain amount of collateral circulation is established during the ischemic period, and the symptoms of unrecognition in patients with cerebral infarction can be partially restored. If the patient has an infarct in the hippocampus, even after active treatment, the patient may have some of the symptoms of cognitive decline remaining.