When is emergency surgery needed for a brain aneurysm?

If it's ruptured: If the aneurysm is ruptured or if there is evidence of increase in size either on a scan or because a neurologic probel arises, urgent treatment should be contemplated.

If it is ruptured : If your aneurysm has bled or ruptured, you need to be evaluated and treated immediately.

Acute SAH: Ruptured aneurysm is a medical emergency, and requires immediate hospitalization. Depending on clinical stability, surgery is to be done asap. Watchful waiting can be a disaster, as patients with a subarachnoid hemorrhage can experience high mortality.