DC microcurrent stimulation linked to lower scar depth

What happened in this DC microcurrent stimulation study

A new pilot study reports that DC microcurrent stimulation was associated with a statistically significant reduction in measured postsurgical scar depth immediately after a single treatment.

The paper, titled “Effects of DC microcurrent stimulation on scar remodeling and tissue recovery,” has been accepted for publication in the Journal of Bodywork and Movement Therapies.

• Design: prospective, nonrandomized cohort study
• Participants: 17 patients with surgically induced scars
• Outcome timing: measured immediately before and immediately after one session

What the evidence shows about DC microcurrent stimulation and scar depth

DC microcurrent stimulation was linked to an average decrease in scar depth of 0.447 mm, which the authors report as a 23.8% reduction after one session.

Researchers measured scar depth at the same anatomical locations using a 17 MHz three-dimensional volumetric ultrasound probe, aiming for an objective structural measure rather than visual scoring alone.

• Mean change: −0.447 mm (23.8%)
• Statistical result: 95% CI 0.264 to 0.630 mm; p < 0.001
• Imaging method: high-resolution ultrasound (3D, 17 MHz volumetric linear probe)

How DC microcurrent stimulation was applied

Each participant received one DC microcurrent treatment using two Dolphin Neurostim devices, with stimulation applied bilaterally along the scar using opposing polarities.

Treatment was applied for 30 seconds per point at about half-inch (1.3 cm) intervals, and sessions lasted about 15–20 minutes.

• Devices: two Dolphin Neurostim units
• Application pattern: bilateral along the scar with opposing polarities
• Dose pattern: 30 seconds per point; ~1.3 cm spacing; ~15–20 minutes total

Why DC microcurrent stimulation and scar depth may matter in recovery

The authors propose that changes in scar morphology could matter for tissue mobility, fascial glide, and rehabilitation, but they note these possible clinical effects remain untested hypotheses.

They also note that thickened or tethered scars can restrict fascial glide and alter biomechanics, while reduced fibrosis or tissue softening could potentially improve mobility and reduce mechanical irritation.

• The study’s main measured outcome was scar depth, not function
• Participants spontaneously reported improved pain and range of motion, but these were not formally measured and need further study
• The authors describe the ultrasound method as a way to objectively track structural scar change after noninvasive interventions

Key limitations and what this study does not tell us

This was a preliminary study with only 17 patients, no control or placebo group, and outcomes measured immediately after a single treatment session.

Because of the design and timing, the study does not establish whether the measured scar-depth change lasts over time or whether repeated treatments would produce similar or larger changes.

• No control group: cannot rule out other explanations for the immediate change
• Single-session, immediate follow-up: durability is unknown
• Nonrandomized cohort: findings need confirmation in larger controlled trials