Cerebral hemorrhage (senile cerebral haemorrhage) refers to bleeding in the brain parenchyma due to rupture of cerebral arteries, veins or capillaries. According to disciplines and practicality, cerebral hemorrhage is divided into traumatic and non-traumatic. Traumatic cerebral hemorrhage is mainly discussed in neurosurgery monographs. Among non-traumatic cerebral hemorrhages, it is divided into secondary and primary cerebral hemorrhages. Secondary cerebral hemorrhage is cerebral hemorrhage caused by some primary vascular lesions, such as blood diseases, connective tissue diseases, brain tumors, cerebral vascular malformations, cerebral vascular amyloid degeneration, etc. Primary cerebral hemorrhage is bleeding in the brain parenchyma due to rupture of cerebral arteries on the basis of arteriosclerosis. Cerebral hemorrhage caused by cerebral arteriosclerosis caused by hypertension is also called hypertensive arteriosclerotic cerebral hemorrhage or hypertensive cerebral hemorrhage, accounting for more than 80% of primary cerebral hemorrhage, which is more common in the elderly.