Whether or not fever is dangerous after cerebral aneurysm intervention surgery needs to be determined on a case-by-case basis. Cerebral aneurysm intervention is a minimally invasive surgical procedure, the main mechanism is to fill the aneurysm with embolic material through a microcatheter to embolize the aneurysm, in order to prevent the aneurysm from rupturing and causing bleeding. Postoperative fever after aneurysm intervention is often indicative of a possible intracranial infection, which is more serious and may result in the death of the patient within a short period of time, with irreversible consequences. Fever may be caused by the sequelae of cerebral hemorrhage. Severe cerebral hemorrhage may lead to paralysis or prolonged bed rest, which may easily combine with intrapulmonary infection and cause fever. In addition, brain hemorrhage absorption can also cause fever to some extent, and fever caused by these two conditions is generally relatively less dangerous. Regardless of the fever caused by these two conditions, patients need to go to the hospital in time to complete the relevant examinations to clarify the cause of the disease and receive timely treatment.