Are home pain relief gadgets safe for use?

It’s best to talk to one’s doctor before buying a pain relief gadget. The product may not work, it may cost a lot of money, it might be dangerous, or it might encourage the user to delay medical treatment. Some high-tech pain relief devices may be effective for some people, such as a transcutaneous electrical nerve stimulation (TENS) machine. And some low-tech devices may also help relieve pain, such as foam rollers, handheld massagers, and heat or cold packs.