I am glad to have found these couple posts on the topic of vibrations. I get what I would described as an extremely localized shuddering. By that I mean that it is there, lasts 1 to 2 seconds and is then gone, for a while at least. I also get what feels like a pin or needle sticking into my skin. After months of investigating and observing, I believe it *is* something sticking me, but from the inside. I watched a new red dot appear on the bottom of my foot one night last week when I felt one of these things.