The Internet of Things is an emerging and growing phenomenon that is rapidly spreading around the world, according to global statistics. The connection of a variety of physical objects to the internet and access to wireless sensor data is called the internet of things, whose achievement is to control the physical world around us. The Internet of Things is constantly offering innovative tools with a variety of capabilities that aim to create an integrated health care system with the vision of ensuring better patient care and reducing costs. Using the Internet of Things in the field of health, many diseases can be identified remotely and part of the treatment process can be done remotely and at home, thus preventing many additional visits to hospitals. The use of IoT technology in the design of health systems reduces human error and increases the level of quality and health safety. Not only is there a search for better solutions, but medical institutions are also looking for solutions to improve economic activity, reduce costs and risks, and increase security to improve the quality of health care. The purpose of this paper is to provide an overview of the IoT scenario and to evaluate its capability in medical technologies using sensor networks, as well as to review the proposed algorithms in this field. We also examine the various aspects of connectivity and interaction that are used in the IoT to exchange information between the users and to examine the applications as well as the implementation of the IoT in the field of medical science. Finally, we examine the challenges of implementation that need to be resolved and examine the future developments approach. The findings can be used as an important study resource for healthcare providers, researchers, technology professionals, and the general public to improve the Internet of Things for healthcare.