What is a subarachnoid hemorrhage? In simple terms, our brain tissue is covered with a transparent membrane like a spider’s web. The space between this membrane and the brain tissue is called the subarachnoid space, which is normally filled with clear, watery cerebrospinal fluid. The most common cause of subarachnoid hemorrhage is a ruptured aneurysm, which is called an aneurysm, but is essentially a balloon-like expansion of the arterial vessels. We treated nearly 300 cases of aneurysms with spring-ring embolization last year alone, and the majority of patients recovered. Therefore, once subarachnoid hemorrhage occurs, do not panic, but treat the aneurysm in a timely manner, otherwise the aneurysm is prone to rebleeding, and then the chances of survival are very slim. There was an excellent teacher who had subarachnoid hemorrhage and it was clear that it was an aneurysm, but the patient and his wife, who was also a teacher, were afraid of the risk of surgery and refused to operate, repeatedly explaining that it was ineffective, and then died a month later with another hemorrhage, which was a great pity. Emergency treatment 1. Sudden severe headache and vomiting should be suspected of subarachnoid hemorrhage and should be sent to the hospital promptly; 2. Keep the patient in a high lateral position to avoid obstruction of ventilation by the back of the tongue, and clear the vomit from the mouth in time to avoid inadvertent aspiration into the airway; 3. The patient should be escorted by medical personnel and the necessary measures should be taken at any time to observe changes in the condition: 5. 6. Avoid vibration as much as possible during transportation; 7. In case of large bleeding, ventricular puncture and drainage or lumbar puncture to release hemorrhagic cerebrospinal fluid is feasible; cranial CT or lumbar puncture can be confirmed; 8. Avoid emotional tension.