it's a glorified form of vertigo, however the "dizzy" attacks can last anything from a few hours to about a week. It really knocks me for six when I get it because I can't do anything at all except sit tight untill it's over. You also get nausea, ear ache, ringing in ears. It's supposidly occurs due to an increased build up of fluid in your ears, however nobody is really to sure on that one, so the best thing they can offer me medication wise is water tablets to try and conteract the fluid. It has also effected my hearing and I have lost around 20% of my hearing in my left ear.