Wearable Microneedle Device Aims to Enable Remotely Managed Pain Relief

Chronic pain often forces patients to rely on repeat clinic visits or prolonged analgesic use, which carries risks of side effects and dependency. Opioids for severe pain can lead to tolerance and misuse, underscoring the need for non-pharmacological alternatives. Skin-attached stimulators offer promise but may be unreliable on sweaty or keratinized skin and can overheat. In response, researchers have now developed a wearable microneedle electroceutical that enables controlled, remotely managed pain modulation for personalized care.

Developed by the Korea Advanced Institute of Science and Technology (KAIST; Daejeon, South Korea) and the Korea Institute of Oriental Medicine (KIOM), the platform combines a wireless microneedle electrode with Internet of Things (IoT)-based remote control in a single skin-worn device. It delivers stable electrical stimulation, supports smartphone-based operation, and can initiate therapy automatically in response to the user’s physiological state. Once safety and efficacy are validated, the approach is intended to reduce the need for in-person visits and reliance on pain medication.

The microneedle electrode is temperature-responsive, conductive, and adhesive. By penetrating the highly resistive stratum corneum, it reduces the influence of sweat and dead skin cells while maintaining consistent current delivery. A conductive hydrogel coating disperses current across the interface to prevent concentration at the needle tips, while a built-in thermal safety feature weakens adhesion and allows the electrode to detach automatically if skin temperature rises abnormally, helping to reduce burn risk.

Remote management is enabled through a smartphone and cloud server, allowing a healthcare provider to set schedules or adjust stimulation parameters in real time, even across long international distances. The system also incorporates a photoplethysmography (PPG) sensor to detect pain-related stress states and trigger closed-loop therapy by automatically initiating electrical stimulation when indicated. Together, these capabilities support supervised, connected care beyond the clinic.

Performance was evaluated in animal experiments and a small human study with healthy adults. Compared with conventional gel electrodes, the device delivered current more effectively and produced pain-relieving effects in animals. In the human study, changes in skin sensory pain thresholds were observed after stimulation, supporting feasibility, while direct analgesic effects were confirmed only in animals. Further clinical studies are needed to establish therapeutic efficacy and the safety of long-term use in patients with chronic pain. The work was published in Nature Communications on August 28, 2026.

“By combining a stable skin interface with IoT-based remote management, we have expanded the potential for wearable electroceuticals in daily life. We hope that, following future clinical validation, this approach can evolve into a personalized digital healthcare platform that enables pain management tailored to each patient's condition,” said Professor Jae-Woong Jeong, KAIST School of Electrical Engineering.

“We hope this research will be integrated with future wearable acupuncture technologies to contribute to the development of a new non-pharmacological pain management approach that stimulates acupoints through electrical stimulation,” said Dr. Sanghun Lee, Korea Institute of Oriental Medicine.

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