Today’s healthcare systems are primarily overactive. Once symptoms appear, patients seek medical attention from doctors, who then treat and observe them in a passive capacity. This method, which prioritizes diagnosis and treatment over preventive healthcare, largely fails to halt the onset of illnesses. It further prevents people from actively participating in their own health monitoring. By enabling people to understand the workings of their own physiology, the rapidly expanding field of portable biosensors, wearable sensors, or wearables seeks to overcome the shortcomings of overactive and centralized healthcare. The long-term goal is to create sensors that may be incorporated into wearable forms, such as wristbands, patches, tattoos, or clothes, to continuously monitor a variety of bodily signs. These sensors will allow people to monitor themselves without costly equipment or qualified professionals by transmitting physiological information as the body changes between healthy and unhealthy states. Commercial wearable devices now incorporate digitalized telemedicine technologies with the Internet of Things (IoT) for noninvasive remote health monitoring. These tools are becoming more and more integrated into our daily lives. A new era of decentralized healthcare has been ushered in with the newly established tools. For any industry involved in healthcare, the development of a wearable monitoring device for telemedicine has generated a great deal of interest in the multimodal big data capture of real-time physiological and biochemical data using non-invasive techniques. The goal of telemedicine wearable development has been to minimize the cost of invasive and high-tech therapies while enabling early identification of a variety of ailments. The advancement of biosensors toward the production of wearable sensors opens the chapter.