Can transcutaneous spinal cord stimulation improve restless legs symptoms?
Transcutaneous spinal cord direct current stimulation (tsDCS) is a non-invasive technique that applies a weak electrical current to the spinal cord through electrodes on the skin. Several small studies suggest it may reduce restless legs syndrome (RLS) symptoms and improve sleep. However, the evidence is still preliminary, and tsDCS is not yet a standard treatment.
What the research says
A 2026 randomized controlled trial of 30 RLS patients found that two weeks of active tsDCS significantly improved RLS symptom severity scores (IRLS-RS) by an average of 12.2 points, compared to only 1.2 points in the sham group 47. Sleep quality also improved more with active tsDCS 47. The study also showed changes in spinal and brain excitability, suggesting tsDCS works by normalizing overactive nerve pathways 47.
Earlier studies using brain imaging in 15 to 30 patients found that tsDCS altered activity in brain regions linked to sensation and movement, and these changes correlated with symptom relief 56. One study reported that improvements lasted at least two weeks after treatment ended 6.
All studies are small and short-term. Larger, longer trials are needed to confirm these findings and determine the best stimulation settings. The research so far is promising but not definitive.
What to ask your doctor
- Could tsDCS be an option for my RLS, and are there any clinical trials I could join?
- What are the potential risks or side effects of tsDCS compared to standard RLS treatments?
- How does tsDCS compare with other non-invasive treatments like transcranial magnetic stimulation?
- Are there any known interactions between tsDCS and my current RLS medications?
- What should I expect during a tsDCS session, and how many sessions might be needed?
This question is drawn from common patient questions about Rheumatology and answered using cited medical research. We do not provide individualized advice.