The main reason why vomiting of blood can occur in brain hemorrhage is due to the fact that brain hemorrhage can lead to the occurrence of stress ulcers. The severity of stress ulcers is mainly proportional to the amount of brain hemorrhage. If the amount of brain hemorrhage is relatively large, the earlier the occurrence of stress ulcers will appear and the more severe the manifestation will be. Brain hemorrhage will lead to increased intracranial pressure, and nausea and vomiting will occur after increased intracranial pressure, so when brain hemorrhage is accompanied by stress ulcers, the patient will vomit blood along with vomiting due to increased intracranial pressure. At this moment, the patient must be sent to the hospital immediately to review the head CT and choose surgery or conservative treatment according to the head CT review to actively control the intracranial pressure and monitor the patient’s vital signs at the same time.