The causes of cerebral vascular rupture include hypertension, cerebral aneurysm and other causes. 1. Hypertension: intracranial arteries have middle layer of myocyte layer and outer layer of connective tissue, no outer elastic layer, therefore, in the process of hypertension and atherosclerosis, small cerebral arteries rupture and hemorrhage due to vitreous degeneration and fibrinoid necrosis, which is the most common cause of spontaneous intracerebral hemorrhage. 2. Cerebral aneurysm: It is a cystic bulging of the arterial wall caused by the limited abnormal expansion of intracranial arteries, which accounts for 75%～80% of subarachnoid hemorrhage. This disease is more common in middle-aged and old people aged 40-60 years old. 3. Others: cerebral amyloid angiopathy, arteriovenous malformation, hematologic diseases, antithrombotic or anticoagulant therapy, vasculitis, trauma and other causes can also lead to cerebral vascular rupture and bleeding. There are many causes of cerebral vascular rupture, and it is recommended to seek medical treatment in time.