Transcutaneous electrical nerve stimulation, also called TENS. A battery-run machine placed on the skin delivers electrical impulses to the painful space. Scientific tests have shown mixed benefits on irrespective of whether TENS works to treat back pain. With its spiky textured floor, the RumbleRoller 12″ Compact Initial Textured Foam Roller https://rollga.com/collections/bestsellers/products/rollga-ohm