Brain tumors need blood vessels to provide a constant supply of nutrients during intracranial growth. And because brain tumors generally grow faster and require more nutrients, blood vessels in tumors are generally richer than in normal tissues, but tumor blood vessels are often structurally incomplete and abnormal blood vessels that are prone to rupture and bleeding. Among brain tumors, malignant glioblastoma and brain metastases are common types of tumors that cause bleeding. Brain tumors are at risk of bleeding as they grow within the skull, and generally malignant tumors are more likely to bleed than benign tumors. The amount of bleeding from brain tumors varies, resulting in different symptoms. A small amount of bleeding from a brain tumor is likely to be asymptomatic, but a large amount of bleeding can create a significant, acute occupying effect, resulting in an increase in intracranial pressure. When the amount of bleeding caused by brain tumors is relatively large, it is necessary to remove the tumor and hematoma as soon as possible to reduce the symptoms of increased intracranial pressure caused by the tumor, to avoid serious life-threatening consequences.