TENS pain relief remains uncertain, with results linked to stimulation intensity
The overall pain result was not statistically significant. Studies using intensity rated appropriate showed larger pain-relief estimates, but evidence certainty was low.
Based on the published abstract. The full paper may contain additional methods, results and limitations.
The 30-second takeaway
This abstract-based review found no statistically significant overall pain benefit from TENS, a form of electrical nerve stimulation. An additional analysis linked intensity categories to differences in pain-relief estimates. That association warrants further study, but low-certainty evidence does not establish which setting works best or how much an individual might benefit.
The authors judged certainty low because studies had high risk of bias and substantial variation. Abstract-only access limits assessment of how intensity categories were defined and compared.
What researchers found
Pain relief by stimulation intensity
Compared with intensity rated inappropriate, in analyses of TENS versus control or placebo. Pain assessment times were not reported; the abstract does not define the effect-size scale.
What the review tested
The researchers combined pain results and explored whether stimulation settings helped explain differences between studies. They examined intensity, frequency, session count and electrode placement, with pain relief as the outcome of interest.
How to read the intensity result
Intensity categories were associated with different pain effects in an additional analysis. Frequency, session count and electrode placement showed no statistically significant influence. Those findings leave uncertainty about whether and how settings alter pain relief.
The original publication
Dose-Response Effects of Transcutaneous Electrical Nerve Stimulation for Chronic Low Back Pain: A Systematic Review and Meta-Analysis.
Amer-Cuenca JJ, Lisón JF, Ferrer-Sargues FJ et al.
Eur J Pain · 2026
- PubMed ID
- 41615263
- Record checked
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