bpcyclist, I have this condition that rears its ugly head when my ferritin levels get too low. Then I have to up my OTC iron supplement and if i take the iron every other day (for better absorption than every day), the symptoms disappear in about 3 weeks time.

I have tested this out over the past few years b/c I struggle with anemia and notice when my iron is really low, my legs and arms go crazy at night when I try to sleep.

So, one possibility is that your iron ferritin level is low right now. That could potentially be causing it. UpToDate