With the continuous advancement of modern medical technology, wearable patch ultrasound technology is emerging as a crucial tool for real-time and dynamic monitoring of visual information within the human body. This technology seamlessly integrates the precision of ultrasound with the convenience of wearable devices, enabling continuous and dynamic monitoring of internal physiological parameters, and providing a more accurate and efficient method for medical diagnosis and health monitoring. Wearable patch ultrasound can obtain the image information of human body in real time, including the structure and functional status of the heart, blood vessels, muscles, and bones, facilitating early disease detection and diagnosis. This review summarizes the major clinical application scenarios and frontier research advances of wearable patch ultrasound and discusses the opportunities and challenges in the future.