The acute phase of cerebral infarction is usually 1-2 weeks. Cerebral infarction, also known as ischemic stroke or stroke, is a disease caused by various reasons of blood supply obstruction in the brain, resulting in ischemic and hypoxic necrosis or softening of brain tissues, which in turn produces corresponding neurological deficits. In the 1-2 weeks after cerebral infarction, patients will suffer from cellular edema due to ischemia and hypoxia of nerve cells, and their condition will be relatively unstable, so it is necessary to pay attention to the observation of whether there is cerebral edema and brain hernia. If the cerebral edema is heavy, or even the formation of brain hernia, the acute period will be longer accordingly. In addition, the location of cerebral infarction and the size of the infarction foci also determine the length of the acute phase. Patients whose infarction sites involve important nerve pathways or nerve structures and whose infarcts are large in size will have a longer acute phase accordingly. Timely, active and effective treatment during the acute phase of cerebral infarction can often reduce the death and disability rate of patients. Therefore, it is recommended that when patients experience hemiparesis, aphasia, headache, dizziness and other symptoms, they must immediately go to the neurology department or emergency room of the hospital.