The first aid methods for subarachnoid hemorrhage are as follows: 1. Call 120 quickly; 2. Absolute bed rest, avoid mood swings, forceful coughing and defecation; 3. Patients with impaired consciousness need to lie on their sides, clean up oral vomit and keep the airway open. Prohibit giving water, food, drugs, etc. to avoid accidental aspiration; 4. For high blood pressure, give antihypertensive drugs in the awake state; 5. While lying in bed, the upper body needs to be elevated and the back is kept at an angle of about 30° with the head to reduce cranial pressure and maintain blood circulation; 6. Ice packs: slow down blood circulation and reduce cerebral edema.