Flexible Wearable Closed-Loop Diagnostic and Therapeutic System: A New Paradigm for Skin Health Management

As the largest external barrier of the human body, the skin is essential to overall health and quality of life. Conventional skin health management faces limitations such as insufficient real-time monitoring and lack of personalization. Flexible wearable devices have recently emerged as a transformative technology, enabling non-invasive sensing and targeted therapy with high skin compatibility. This review comprehensively summarizes recent advances in flexible wearable closed-loop diagnostic and therapeutic systems for skin health management. It outlines the core technological components, including skin bioinformation collection, biosignal monitoring, signal transmission and data analysis, and targeted intervention. Key applications in physiological and pathological monitoring, wound healing, drug delivery, and physical therapy are discussed. Furthermore, the innovation trajectory of closed-loop systems is clarified, key challenges are analyzed, and targeted solutions are proposed. Future directions are prospected from cross-disciplinary views including digital twins and personalized medicine, establishing a new paradigm for real-time, personalized, and continuous skin health management.