The brainstem is the central hub of life in the human body, controlling vital functions such as blood pressure, pulse, respiration, body temperature, and consciousness. Bleeding in this area is extremely dangerous and is a life-threatening condition. Clinically, it has a high mortality and disability rate. For hemorrhages larger than 5 mL, most patients will succumb to central respiratory and circulatory failure within 48 hours. Even if the bleeding is less than 5 mL, although aggressive resuscitation may save the patient's life, most will suffer from severe brain dysfunction such as hemiplegia, aphasia, or a vegetative state. Therefore, brainstem hemorrhage is very dangerous.