Severe cerebral infarction is manifested as consciousness disorder, brain death and so on. 1. Obstruction of consciousness: Cerebral infarction is caused by ischemia and hypoxia leading to ischemic necrosis or softening of brain tissue. When cerebral infarction is serious, patients may show symptoms of consciousness disorder such as drowsiness, lethargy, coma, fuzzy consciousness, delirium, etc. At the same time, it may be accompanied by hemiplegia, epileptic seizure and other symptoms. 2. Brain death: Severe cerebral infarction can manifest the symptoms of brain death, and its main symptom is deep coma. When the patient is brain dead, he/she will not have any response to external stimulation, and all brainstem reflexes will disappear. The patient will have no voluntary activities, and he/she will not be able to breathe, cough, sputum, eat, drink, urinate or defecate by himself/herself, etc. Therefore, when the patient is diagnosed as brain dead, he/she will not have any response to external stimulation. Therefore, when diagnosed with cerebral infarction, treatment should be carried out in time to avoid adverse effects that may affect health.