A technology answer to the world's health concerns, ubiquitous healthcare is being considered. A combination of rising healthcare expenses and a growing demand for high-quality medical care has led to this. The development of the Internet of Things (IoT) has a greater impact on IoMT. Improved health care and safety are being provided to millions of people worldwide as a result of the Internet of Things (IoMT). Remote monitoring and transfer of data can provide medical data centres, such as those in the cloud, with real-time access to patient health characteristics. As a result, healthcare is more accessible, more effective, and less expensive. It's a problem, however, because of the proliferation of Internet of Things devices. This poses a problem because IoMT devices are compact and have a limited number of schemes and computing power. It is challenging to administer and safeguard IoMT systems because of their widespread use. This is a major problem that prevents the therapeutic application of IoMT. Internet of Things (IoT) security issues, threats, requirements, and potential future research are all covered in this report. Existing solutions and unresolved issues in the realms of security and privacy are also receiving considerable attention. This paper provides a general overview of the various art techniques by using a recognised solution.