The rapid advancement of digital health technologies and sensor innovations has transformed wearable health monitoring systems, enabling unprecedented levels of personalized care, real-time health tracking, and early disease detection. This paper explores the pivotal role of these technologies in revolutionizing the healthcare landscape. We examine the integration of cutting-edge sensors, including biosensors, motion sensors, and environmental sensors, within wearable devices, which allow for continuous monitoring of physiological parameters such as heart rate, blood pressure, glucose levels, and physical activity. The paper also highlights the growing impact of artificial intelligence (AI) and machine learning (ML) in enhancing the accuracy, predictive capabilities, and decision-making processes of these systems. Furthermore, we discuss the challenges of data privacy, system interoperability, and the need for robust regulatory frameworks to ensure the safe and effective implementation of wearable health devices. In conclusion, we propose that the continued evolution of digital health technologies and sensors will play a crucial role in the future of preventive healthcare, offering new opportunities for improving health outcomes and reducing the burden on traditional healthcare infrastructures.