The danger period after cerebral infarction is usually within 14 days of onset. Within 14 days is the period of cerebral edema, and patients can develop high cranial pressure, which may cause brain herniation in severe cases and lead to death of the patient. Patients can also develop impaired consciousness, including coma, blurred consciousness, delirium state, and may also have unstable vital signs, and may have difficulty swallowing and choking on drinking water. If a patient has been ill for more than 14 days, the cerebral edema usually subsides and the condition stabilizes. However, if the patient has a large cerebral infarction, there may be some comorbidities and the patient may also die from complications, such as aspiration pneumonia, urinary tract infection, and deep vein thrombosis of the lower extremities. Patients must be given timely and correct treatment during the acute period after the onset of the disease.