Brainstem hemorrhage is a serious cerebrovascular disease that is very dangerous and has a very high mortality rate. Because the brainstem is an important concentration of nerve conduction fibers, and it is also the center of life, it can cause interruption of the brain conduction bundle, and limb paralysis or even disability. In addition, it can also cause abnormalities in the vital center, resulting in lowered or unmeasured blood pressure and, in severe cases, cardiac and respiratory arrest. The brainstem is divided into midbrain, pontine and medulla oblongata. Patients behave differently due to bleeding in different parts: 1. Midbrain hemorrhage: it can cause tetraplegia due to injury of the pyramidal bundle, and the eyes can only move up and down, and patients can express themselves by moving their eyes up and down; 2. Pontine hemorrhage: it can cause incomplete damage to the nerve conduction bundle, and it can also affect the superior reticular activation system, causing symptoms of open-eye coma. Open-eye coma means that the patient has the activity of opening and closing the eyes, as well as the sleep cycle and the wake cycle, but is in a state of unconsciousness and the brain is in a comatose state, called open-eye coma. In addition, there will also be corresponding changes in cranial nerve injury, including facial palsy and trigeminal nerve injury, as well as vestibular nerve injury, with corresponding symptoms; 3. Medullary hemorrhage: Patients usually experience respiratory, cardiac, and blood pressure arrest, which leads to death and requires a ventilator to maintain.