Latest news is that science says TENS does not work for lower back pain. I believe that electrical current and magnets can cause pain to ease. However, we are now seeing that things are such that big pharma claims other methods are bogus and should be halted at once.
This is sad since a nickels worth of electricity is often more effective that thousands of dollars worth of chemicals in finding a cure. I have suffered lower back pain. Well, one thing that helps is a cold compress. That helps numb the pain.