According to the Brain Aneurysm Foundation, recovery from an aneurysm can take anywhere from a few days to several months, depending on whether the aneurysm ruptured and the type of treatment received. If the aneurysm doesn't bleed, a patient can resume normal activities within a few days of the procedure.
If someone suffers a subarachnoid hemorrhage with an aneurysm, recovery lasts much longer, explains the Brain Aneurysm Foundation. After surgery, a patient is held in the hospital and monitored for a minimum of two weeks. In the best-case scenario, the patient can resume regular activities after a few more weeks of recovery after release. If a patient receives a craniotomy, that patient is released from the hospital within a few days, and full recovery is expected to occur within four to six weeks, with a gradual increase in activity over that time. However, the side effects of a brain aneurysm may last for multiple years.