I’ve tried a whole bunch of TENS units. Here are my reviews of the best ones I tested, that meet criteria of both value and features.
The purpose of the TENS unit is to send a low-voltage electrical current to a specific body part, which is believed to help block pain signals from being sent to the brain, eliminating pain.
There are many other and spices that can alleviate back pain, but this list is for the best herbs for back pain. These herbs have the most anecdotal and clinical evidence I could find online.