The danger period for most acute cerebral infarcts is within one week of onset, and in some severe cases it is about ten days to half a month. Patients with acute cerebral infarction are very unstable at the beginning of the disease, and symptoms such as limb paralysis may re-aggravate or new symptoms may appear at any time. The peak of cerebral edema is reached in 3-5 days after the onset of the disease, and the patient’s condition is more dangerous at this time, so it is necessary to reduce intracranial pressure, maintain sufficient cerebral perfusion and prevent the occurrence of brain herniation. In some patients with more serious conditions such as massive cerebral infarction, the symptoms of cerebral infarction may worsen and deteriorate during active treatment, and the patient’s risk period will be prolonged when complications such as fever, electrolyte disorders, pulmonary infections and decubitus ulcers appear gradually with the prolongation of the onset time. At present, the treatment of acute cerebral infarction mainly includes ultra-early thrombolytic therapy, antiplatelet therapy, anticoagulation therapy, endovascular therapy and surgical treatment. The patient’s family should be aware of the disease, help the patient to build up confidence, and do a good job of care.