I 've gotten dizzy spells on and off for years starting at age 25 and I'm now 77. Mine seem to be directly related to allergies, hayfever sinus drainage specifically. I believe it's all related to fluid in my inner ear. Mine can be severe. I have mild spells to begin with which warn me to take anti-histamines. Unfortunetly new age, safer anti-histamines do not help me, so I take chlorpheniramine malate, cm, a cheap old school anti-histamine with the same long term side effects as benadryl, but the cm doesn't make me sleepy. At the start of a spell I am warned when one will strike in a few seconds because I get a pleasurable feeling, and a light ringing in my ears which gives me enough time to grab hold of support or sit down. If driving I pull over because I become slightly paralized because my brain slows down. If I try to live with these light spells and not take cm then the spells become more severe lasting for a few minutes.