I've had ear pain for years that comes out of nowhere. I'll be minding my own business and all of a sudden I'll be grabbing my ear and trying to hold my eardrum in, because it feels like someone is stabbing me with a giant icepick.

I dont know what causes it, and it usually will happen out of the blue, and then will go away and I wont feel it again for a month or more.

I've never actually associated it with the MS, but I guess that could be one explanation.