Sudden cerebral hemorrhage, also known as sudden cerebral hemorrhage, can be divided into two main categories, including primary and secondary causes. Primary causes mainly refer to cerebral hemorrhage caused by high blood pressure. Cerebral hemorrhage occurs after high blood pressure ruptures blood vessels in the brain and blood flows out at the rupture. Secondary causes refer to the occurrence of cerebral hemorrhage caused by other factors, including vascular malformation, aneurysm, coagulation dysfunction, after anticoagulation or antiplatelet medication, and also after thrombolytic therapy, and also after cerebral infarction with the transformation of hemorrhage. Not only that, hematologic disorders, smog, primary or metastatic brain tumors, as well as venous sinus thrombosis, vasculitis, and pregnancy, may lead to secondary cerebral hemorrhage.