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.
An unexplained dilation of the pupils. Under normal conditions, a pupil is supposed to dilate only in conditions of low light when it expands to let more light into the eye. An expanding aneurysm could well put pressure on different nerves that lead from the brain, and this, of course, includes the optic nerve. If you or someone you know suffers an unexplained dilation of the pupils, it must be considered as requiring immediate emergency care, as this symptom is a certain sign of serious issues that can affect the brain, such as, as tumors, or an aneurysm, or stroke.