Telehealth is increasingly used to manage many long-term conditions including ones which affect physical and mental health. The range of methods of delivering telehealth is increasing as technology, and the internet, develop and become increasingly ubiquitous. The various means of delivering telehealth includes the use of computers, smart phones, mobile phones and landlines. As the means of communicating remotely increase, so do the range of ways in which telehealth can be used to both monitor long-term conditions and aid in the delivery of self-care. This paper reviews various applications of telehealth as they are applied to the management of type II diabetes. It examines the role of the different forms of technology in monitoring the disease remotely, in prompting episodes of self-care and in the delivery of proactive education. The review identifies sixteen randomised controlled trials which all use telehealth, in at least one of its forms, to deliver monitoring, disease management prompts and proactive education (or any combination of the three) remotely. The quality of the evidence uncovered is variable, with the long-term utility of many of the approaches remaining largely unproven because of the time limited nature of the research available. The least equivocal findings are from the studies which take a three pronged approach to the delivery of telehealth – monitoring, prompting and educating – which all showed measurable benefit in terms of the management of blood glucose levels. This improvement also held true for the studies which employed both monitoring and real time disease management prompts alone. The evidence suggests therefore, that attempts to use telehealth to improve the management of type II need to include, at the very least, an element of remote monitoring and real-time disease management prompts. Whether the benefits which accrue from these approaches have any long-term value needs to be further researched.