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This paper presents a review of Internet of Things (IoT) devices and issues in IoT system development for healthcare systems. In this study, key issues which led to the development of anIoT system in the healthcare field are emphasized and the associated IoT devices to solve these issues are identified. As IoT applications began to expand in all sectors and industries, some potential and issues have been recognized by both the engineering professionals and the medical professionals that can be solved or facilitated using IoT systems. This paper delves into the main issues that trigger IoT in the healthcare system and the IoT devices that are widely used either by the healthcare worker, healthcare provider, patients, and other people interested in constantly monitoring their health. Subsequently, this study explores the benefits and future opportunities of the IoT system and devices in the healthcare system.