Clinical trial Recruiting at 1 site Interventional Ages 18 to 60

Brain stimulation for urges in skin-picking and nail-biting.

Official title: Evaluating the Impact of Transcranial Direct Current Stimulation on Urge in Body-Focused Repetitive Behaviors

Run by University of Kentucky · NCT07019571 · Data updated 2026-11-12

This study will try transcranial direct current stimulation (tDCS) to see if it reduces urges and how often people pick their skin or bite their nails.

Quick facts

Study typeInterventional
Ages18 Years to 60 Years
SexAll
Enrollment55 (estimated)
SponsorUniversity of Kentucky
Academic / other
Locations1 site (Lexington, Kentucky)
StatusRecruiting
StartedJuly 8, 2025
Main results expectedMay 2026
Study endsMay 2026
Registry record updatedJuly 23, 2025
Trial IDNCT07019571 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults who experience mild to extreme urges to pick their skin or bite their nails, can provide informed consent, and can tolerate tDCS.

Probably not a fit

People with unstable medical or psychiatric conditions, a history of seizures or major neurological disease, current suicidal intent, pregnancy, or other contraindications to tDCS are excluded and would not be expected to benefit.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

Participants with recurrent skin-picking or nail-biting will be brought into the lab and exposed to cues and boredom tasks that trigger urges. They will receive either real wireless multichannel tDCS or a sham (placebo) device while rating urge intensity before and after stimulation. Researchers will compare changes in urge ratings and the occurrence of picking/biting between the real and sham groups. The protocol pairs noninvasive brain stimulation with behavioral provocation to measure immediate and short-term effects on urges and behaviors.

Why it matters

Potential benefit: If successful, this noninvasive approach could lower urge intensity and reduce how often people pick or bite, offering a new treatment option.

How similar studies have gone: Small prior studies of tDCS for compulsive behaviors and related disorders have shown mixed, preliminary results, so this approach remains experimental.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Ability to provide informed consent (as established by clinical interview), and voluntary, signed informed consent prior to the performance of any study specific
* Ability and willingness to perform study-relevant clinical assessments and tDCS
* Endorses mild to extreme intensity of urges to pick or bite their skin or nails

Exclusion Criteria:

* Any unstable medical, psychiatric, or neurological condition (including active or otherwise problematic suicidality) that may necessitate urgent treatment
* Daily use of psychotropic medications that substantially lower seizure threshold (e.g., clozapine)
* History of psychosis, mania, major neurological disorder, significant head trauma, or seizures/epilepsy
* Current suicidal intent
* Any major neurological disease or history of major head trauma, including concussion with extended loss of consciousness, or of psychosurgery
* Current or suspected pregnancy
* Endorsing possible contraindications for tDCS

Where it's running

  • University of Kentucky
    Lexington, Kentucky, United States
    Recruiting

Study contacts

Similar studies

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How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.