Hi Mike. This issue was raised some weeks ago, I think by Danny. Dinah's rad oncologist told her that about 5% of patients experience the electrical current feeling. As I told her, that makes us special. In my case, lowering my head to look down triggers it. However, mine, over the last couple of months, has become less and less intense. I go days now without noticing it, so perhaps yours will go away too. It is not anything except an after effect, so take comfort that you are in an elite group (grin). That said, however, I think you should investigate the dizziness, as I do not recall that anyone in our small group experienced that.
Joanna