I have a constant high pitched buzz in my head----not my ears, inside my upper cranium. I feel slightly light headed, but there is no pain. When the buzz is at its strongest it seems to sweep in a wave across the inside of my cranium----from my left to right. It lasts only a split second, but if it would last 3-5 seconds I am certain I would faint. I also have very slight blurriness of vision. Can this be a warning of a stroke or aneurysm? BTW, I also suffer from allergies, so----a layman's conjecture---might this be a weird sinus infection? Thanks for your attention.

Also, btw, my wife is a retired crna, so you can use jargon, because she will probably understand your language. Further----I am a Classicist, so I recognize Latin and Greek cognates as they pertain to medicine----sometimes. Sincerely, Edward Danis