Comatose patients with brainstem hemorrhage may hear sound or may not receive sound transmission, depending on the degree of coma caused by brainstem hemorrhage the specifics are as follows: 1. Can hear sound: brainstem reticularis superior activation system can keep the cerebral cortex awake, when the brainstem hemorrhage is not compressed or its destruction is small, the patient is in a shallow coma, the stimulation of sound and other stimuli can be open eyes, limbs, etc., which means that the patient can hear the sound and can respond to the content. 2. Can’t hear sound: when the amount of brainstem hemorrhage is large, the brainstem reticularis superior activation system is damaged, the patient is in deep coma, the sound signal can’t reach the brain, the cerebral cortex can’t process the sound stimulation and can’t release the instruction to make a response, at this time, the patient usually can’t hear the person talking. It is recommended that patients should consult a doctor in time if they feel unwell, and should not be negligent to avoid delaying their condition.