Ear zaps might tame pain – but Don't get excited yet
NCT ID NCT02821741
First seen Jun 25, 2026 · Last updated Aug 14, 2026 · Updated 3 times
Summary
This study tests whether stimulating a nerve in the left ear with a mild electric current can change how healthy people perceive pain. Over two sessions, 76 volunteers will receive stimulation either on the vagus nerve area or a non-nerve spot, while a heat probe is applied to their arm. Researchers will also track mood and vital signs to see if mood influences pain. It's a small, early study in healthy people, so it won't directly lead to a new treatment yet.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
- Active substance
- transcutaneous electrical nerve stimulation (TENS) device
- What this could lead to
- If successful, this could point toward a non-drug way to manage pain by stimulating the vagus nerve through the ear.
- What could go wrong
- This is a small, early-phase study in healthy volunteers, not patients. Results may not apply to real pain conditions, and the effect may be too weak to be useful.
This is an AI summary of the original study and may miss details. Read our disclaimer.
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As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
-
National Institutes of Health Clinical Center
RECRUITINGBethesda, Maryland, 20892, United States