TENS, or transcutaneous electrical nerve stimulation, sends electrical current through pads on the skin. It works in the milliamp range rather than the microamp range, and it is meant to be felt, usually as a tingle or a buzz. TENS units are common in pain care and easy to buy for home use.
Why it is in the Library
People often ask whether microcurrent is the same thing as TENS. It is not. TENS is designed to be felt. Microcurrent is designed to stay below sensation, at levels closer to the body’s own electrical signals (Iijima & Takahashi, 2021; Wadhwa et al., 2026). Same family of tools, different intention. We do not offer TENS sessions; it appears here so the comparison is clear.
What is established
The tingle is the point. Current passed through the skin at these levels excites sensory nerve fibers beneath the pads, which is why TENS is felt and microcurrent usually is not.
Where the evidence is mixed
TENS has been studied far more than most electrical wellness tools, and the results still divide. The largest meta-analysis to date pooled 381 randomized trials with 24,532 participants. Compared with placebo, pain intensity was lower during or immediately after TENS (standardized mean difference −0.96, 95% CI −1.14 to −0.78), which the authors rated as moderate-certainty evidence, and adverse events were generally mild (Johnson et al., 2022). An earlier overview of Cochrane reviews on chronic pain reached a more cautious verdict. It found the reviews themselves well conducted but the evidence inside them very low in quality, mostly small trials, and could not conclude with any confidence whether TENS helps or harms people with chronic pain (Gibson et al., 2019).
The two can be read together. The 2022 analysis speaks mainly to pain during or right after a session, while the Cochrane overview asked about lasting benefit in chronic pain. For painful diabetic neuropathy specifically, a meta-analysis found that TENS reduced pain more than placebo (standardized mean difference −0.44, 95% CI −0.79 to −0.09), while electromagnetic field treatment did not (Stein et al., 2013).
References
Gibson, W., Wand, B. M., Meads, C., Catley, M. J., & O’Connell, N. E. (2019). Transcutaneous electrical nerve stimulation (TENS) for chronic pain: An overview of Cochrane Reviews. Cochrane Database of Systematic Reviews, 2019(4), Article CD011890. https://doi.org/10.1002/14651858.CD011890.pub3
Iijima, H., & Takahashi, M. (2021). Microcurrent therapy as a therapeutic modality for musculoskeletal pain: A systematic review accelerating the translation from clinical trials to patient care. Archives of Rehabilitation Research and Clinical Translation, 3(3), Article 100145. https://doi.org/10.1016/j.arrct.2021.100145
Johnson, M. I., Paley, C. A., Jones, G., Mulvey, M. R., & Wittkopf, P. G. (2022). Efficacy and safety of transcutaneous electrical nerve stimulation (TENS) for acute and chronic pain in adults: A systematic review and meta-analysis of 381 studies (the meta-TENS study). BMJ Open, 12(2), Article e051073. https://doi.org/10.1136/bmjopen-2021-051073
Stein, C., Eibel, B., Sbruzzi, G., Lago, P. D., & Plentz, R. D. M. (2013). Electrical stimulation and electromagnetic field use in patients with diabetic neuropathy: Systematic review and meta-analysis. Brazilian Journal of Physical Therapy, 17(2), 93–104. https://doi.org/10.1590/S1413-35552012005000083
Wadhwa, K., Singh, A. K., Bhatnagar, R. B., & Kapoor, K. (2026). Role of microcurrent electrical stimulation in tissue healing and scar modulation: A systematic review. The International Journal of Lower Extremity Wounds. Advance online publication. https://doi.org/10.1177/15347346261469606