I have developed what can only be described as a 'wobble' - my upper body has moments when it involuntarily sways from side to side (like wobbling your head but it's the upper body). It's not all the time, and just happens randomly.
Coincidentally, I met a woman in a pub garden yesterday who had a very serious version of this - she couldn't keep still. I wanted to ask her if she knew the cause but felt it would be rude.
anyone any wiser?