Digital healthcare is increasingly integrating next-generation information technologies, accelerating the intelligent transformation of healthcare services. Physiological and psychological sensing, a core technology underpinning personalized health management, chronic disease monitoring, and precision medicine in digital healthcare, is advancing rapidly toward multi‑scenario integration and full‑lifecycle coverage. This study reviews its development across routine contexts such as households, communities, and medical institutions, as well as specialized domains including spaceflight, aviation, and maritime settings. It further examines core challenges in four dimensions: safety, convenience, intelligence, and human-centered care. To support sustained advancement, we propose five suggestions: establishing trustworthy data circulation and privacy protection systems, enhancing system adaptability and service responsiveness, strengthening knowledge integration and precise decision-making, embedding human values and population-level adaptability, and fostering coordinated development of key technologies. These efforts aim to enable continuous, precise, lifecycle healthcare services and drive collaborative innovation and deep transformation of the digital healthcare system.