Have you seen a doctor for a CAT-Scan or a MRI of your head? Or a recent physical?
An abcess is similar to a boil or a pimple and would not cause these type of symptoms. Here is a site from the web describing the symptoms of an Aneurysm. See your Doctor asap.
http://www.emedicinehealth.com/aneurysm_brain/page2_em.htm


