Transcutaneous electrical nerve stimulation (TENS) uses tiny electrical pulses to relieve pain. It doesn’t hurt.
You can find a TENS unit at a drugstore or online. It’s about the size of a smartphone and comes with patches called electrodes. You put them on the painful area and turn the unit on and off as your pain comes and goes.
For some people, it eases the pain that can linger after shingles. There are even some reports that it may help with the shingles outbreak itself.