Aneurysmal subarachnoid hemorrhage is a type of stroke that occurs when a weakened blood vessel in the brain ruptures, causing bleeding into the space between the brain and the tissues covering the brain. This condition is often life-threatening and requires immediate medical attention. Common symptoms include sudden onset of severe headache, nausea, vomiting, and loss of consciousness. Treatment involves stabilizing the patient, controlling bleeding, and preventing complications such as vasospasm and cerebral ischemia. Surgical interventions such as clipping or coiling of the aneurysm may be necessary to prevent re-bleeding. Research in this area focuses on improving early detection, understanding risk factors, and developing new treatment strategies to improve outcomes for patients with aneurysmal subarachnoid hemorrhage.