Cerebral aneurysm is a “time bomb” in the skull and can be life-threatening at any time due to rupture and bleeding. In general, a cerebral artery with a history of subarachnoid hemorrhage has a 50% chance of reoccurring within six months, while a patient with a second subarachnoid hemorrhage may have a mortality rate of 70%. Therefore, conservative treatment (also called drug treatment) is not recommended for cerebral aneurysms with a history of hemorrhage, but should be actively treated with craniotomy or interventional embolization. Craniotomy for cerebral aneurysm is the traditional treatment for cerebral aneurysm, and a scalp incision has to be made first. The frontotemporal curved incision, also known as the pterygoid incision, is the most commonly used incision. The muscles are separated to reveal the partial skull, and a special drill or mill is used to remove a bone flap of approximately 5-8 cm in diameter. The lobes of the brain tissue are then separated under the microscope, and the cerebral artery is found in the interstices of the brain tissue, and the “neck” between the aneurysm and the normal cerebral artery is clamped with a special cerebral aneurysm clip to achieve the purpose of treatment. 2.Interventional embolization treatment of cerebral aneurysm Interventional embolization treatment of cerebral aneurysm started relatively late compared with craniotomy, but the development is changing rapidly. With the development of new materials, new technologies and new techniques, the interventional embolization treatment of cerebral aneurysm has become safer and safer. The most common interventional treatment for cerebral aneurysms is embolization of the aneurysm with a spring coil. Simply put, a very thin microcatheter is inserted from the femoral artery at the root of the thigh, and a very thin microcatheter is inserted directly into the cerebral aneurysm through the official cavity of the artery, and then a section of a coiled microspring coil is fed through this very thin microcatheter, which gradually fills the aneurysm cavity and induces thrombus formation, so that no blood flows through the aneurysm cavity while the normal cerebral artery remains unobstructed, thus achieving the purpose of treatment. Whether a cerebral aneurysm is suitable for craniotomy or interventional embolization treatment depends on the specific situation. Some aneurysms are suitable for craniotomy, some are suitable for interventional embolization, and some are suitable for both. The final treatment choice needs to be determined based on the location, morphology, size, presence of multiple brain aneurysms, the width of the aneurysm neck, the patient’s vascular condition, and the patient’s economic status.