How and why can I feel electricity in my head?

For some time now I have been able to sense electricity. When I am near a source of high voltage, such as high voltage electric lines or if a strong lightening storm is moving through. I feel a sharp headache. It always feels the same. It gets stronger if I get closer to the source or if lightening is about to strike closely. Can anyone explain this? Has anyone ever heard of it? Am I the only one able to sense electricity or can others do it? What is going on?