yep...i get that. somebody told me it may be anxiety. I had GAD and now classified as anxiety disorder NOS (i think due to panic attacks and generalized anxiety together). but i have not noticed a pattern other than it almost always is around my legs or stomach. it feels like a hair or a spider. it is only intermittent and goes away just to return another day/time...literally no predictability. it is only an annoyance to me, so i have never brought it up but i imagine if it bothers you to a moderate/high degree...then it is time to mention it to your T or pdoc.