Subarachnoid hemorrhage is serious.

Subarachnoid hemorrhage is a common and dangerous disease. about 10% of patients with subarachnoid hemorrhage die before treatment. The mortality rate at 30 days is about 25% or higher, and the annual recurrence rate after 6 months is about 2%-4%. Subarachnoid hemorrhage patients are prone to intracranial hypertension, brain herniation and endangering patients 'lives. Subarachnoid hemorrhage patients are prone to secondary hemorrhage during treatment, which makes the disease worse. Subarachnoid hemorrhage is a serious disease, and its course and prognosis are related to the patient's cause of disease, blood pressure, age and signs of nervous system.