In the case of subarachnoid hemorrhage, the most important treatment includes etiological treatment and symptomatic treatment, which are mainly as follows: I. Etiological treatment: 1. Surgical treatment: surgical treatment may be performed to perform aneurysm ligation; 2. Minimally invasive treatment: minimally invasive treatment by interventional puncture may be performed to prevent further rupture and bleeding of the vessel by embolization of the corresponding vessel with a spring coil. Symptomatic treatment: 1. intracranial hypertension: cerebrospinal fluid may be released by puncture; 2. cerebral edema: mannitol, tachypnea (furosemide), etc. may be used for further dehydration to prevent cerebral edema; 3. intracranial vasospasm: nimodipine may be used to prevent arterial spasm; 4. other conditions: including sedation treatment, such as the use of diazepam, and corresponding medications for elevated or reduced blood pressure. The patient is treated with the appropriate medication for the increase or decrease in blood pressure. It is through the treatment of the patient’s cause and symptoms that the patient’s prognosis can be further improved.