The main clinical manifestations of subarachnoid hemorrhage are sudden severe headache, accompanied by nausea and vomiting, with positive signs of meningeal irritation. If such symptoms occur, it is urgent to seek medical attention and perform a cranial CT scan. If the CT shows a high-density shadow in the subarachnoid space, it can be diagnosed as subarachnoid hemorrhage, and the patient should be treated in neurology or neurosurgery for active management. Clinically, conservative medication treatment is generally adopted, paying attention to changes in the patient's consciousness and pupils, and surgical treatment may be considered if necessary.