I'm glad to be able to help you a little with this....as an aside, this forum strikes me as TOTALLY different from the others, i.e., rumors/news, etc...and for this, I'm grateful. From this thread, I'm very happy to see the many people trying to reach out and help another person......and, the information will likely help many others.
Miroku-
Regarding the TENS unit.....about 20 years ago, I had a herniated disc and using the TENS unit helped me a great deal. I've also seen my patients respond well with this....BUT....to echo the posts of others....especially with Tramadol, you do NOT want to just stop taking this or any other medication on your own. You should speak with your doctor FIRST - explain your situation fully and any concerns you have, and then together, you can make an informed decision. Again, I hope that you're feeling better soon and safely back in the skies....take care and God bless!