--will experience these "periodic", for lack of a better term, "zats" or "pulses" of electrical type tingling/pain.

They often start after exertion--in my case, there is some evidence they may have to do with nerves being compressed by swelling of other body tissues--and continue for a while. Over hours to days they often suddenly disappear (they don't tend to "fade out").

In my case, the leading theory is this has to do with nerve regrowth from my acute onset body-wide burning neuropathy; fibers that are are regrowing do so slowly but do have to fight past and through lots of other tissues, and often wind up in pathways dissimilar to those traversed prior to the original nerve injuries, so that they are more prone to compressive effects.

The problem, of course, is that not only may your experience not be mine, but such symptoms can be a result of an ongoing pathologic process as well as a "healing" one. And, to add further complication, symptoms of problems with portions of the central nervous system--brain and spinal cord--can be exactly mimicked by those stemming from problems with more peripheral nerves. It's why when these symptoms occur there is often a lot of involved testing--imaging of spine/brain, nerve conduction studies/EMG's, blood work-ups, etc.--to try to "pin down" just WHERE the symptoms stem from.