Not sure it was a flare, but my worst time(before I got the DX) was dealing with a slight bladder problem, head spinning and cognative stuff. My last vertigo episode was bad enough to get me on the track to figuring out what was happening. We all knew it wa sgoing to be MS as a few family members have had it and one is still around who has it in my direct blood line. This has peaked an interest in my doctors.