Subarachnoid hemorrhage depends on the amount of bleeding and the location to determine the severity of the condition. It can be life-threatening in severe cases. If symptoms such as headache and severe vomiting occur, the possibility of subarachnoid hemorrhage should be considered. Initially, a cranial CT scan should be conducted to confirm the diagnosis. Further investigations should include cranial MRI or CTA vascular imaging, preferably CTA, to determine whether there is rupture bleeding caused by an aneurysm. In such cases, it is necessary to consider whether emergency surgery is required, based on the amount of bleeding and the condition of the blood vessels, and the possibility of an aneurysm to guide further treatment.