There are more causes of sudden and large brain hemorrhage, the more common ones are hypertension, diabetes causing vascular sclerosis and decreased elasticity, resulting in a larger amount of bleeding, or intracranial aneurysm rupture bleeding bleeding is also larger. In older patients, brain atrophy is more obvious, so it is not easy to stop bleeding after bleeding, resulting in a larger amount of bleeding. There are also other causes, such as hematologic diseases, kidney failure, liver failure, because the clotting mechanism is impaired, so once bleeding, can not stop bleeding will also appear large brain hemorrhage. Doctors will consider this aspect when doing surgery or treatment, and will first administer medication or comprehensive treatment for the cause to achieve satisfactory hemostasis while treating the bleeding.