What could cause brain bleeding?

Blood vessel disease: Defects of blood vessels in the brain can result in brain bleeding. The most common is avm, then aneurysms. These can be congenital or acquired. Some bleeding can be caused by high blood pressure. Bleeding disorders including homophilia and sickle cell can cause brain bleeding. Trauma and shaking will result in bleeding over or into the brain. Severe infections may cause bleeding as well.