Cerebral hemorrhage is a type of acute cerebrovascular accident and is quite dangerous. The risk associated with cerebral hemorrhage is directly related to the amount of bleeding and the location of the bleed. Generally, if it is an ordinary lobar hemorrhage and the volume of blood is less than 30 milliliters, the risk is relatively low, and conservative medical treatment may be sufficient. However, if the bleeding exceeds 30 milliliters, there is an indication for surgery. Without surgery, conservative treatment may lead to an increase in hematoma and progressive surrounding edema, which could compress the brainstem, cause brain herniation, and lead to respiratory and circulatory failure, posing a life-threatening risk. Hemorrhages in the brainstem and cerebellum are even more dangerous. The brainstem is the center of vital functions, including the centers for breathing and heart rate. Typically, a bleeding volume exceeding 5 milliliters in the brainstem can lead to patient death. Since the cerebellum is close to the brainstem and might compress it, a bleeding volume exceeding 10 milliliters in the cerebellum often warrants consideration for surgery.