I have had the same sensations for only about a year or two, and my friend who is a nurse suggested that my histamines were out of line, to take anti-histamines to stop it. I have been taking anti-histamines for a few months now, and it hasn't made a difference. I wish I could figure out what causes these weird pain bursts, and also I have have experienced itchy, crawly skin, like invisible bugs are crawling on me. At different locations, at different times, sporadically. Very odd. If you have any answers, my email is ***@****.
Just a suggestion, one that is very different - have a look at a spirit medicine plant herb in Peru called Ayahuasca and look at another healer (no religious affiliation attached) called John of God or Joao de Deus in Brasil.I recently visited both within a year and all my symptoms, some similar to yours, some not, disappeared. When you read about these two types of healing it'll make a lot of sense. good luck.