Pain in the head. When you are suffering from an aneurysm, this can be quite a common symptom. When an aneurysm in the brain has not been ruptured, it is small and may not trigger this symptom. However, as it grows larger it exerts pressure upon the brain, or upon crucial nerves that reach out from the brain, and this can cause a local pain in the head, as well as other symptoms triggered by an aneurysm. If an aneurysm is not suffering a major rupture, but is instead, leaking small quantities of blood, it can trigger an intense pain in the head that comes on rather suddenly.