With the perspective of ubiquitous computing becoming more common form of technology in our everyday lives, our increasing dependency on these systems will require them to be always available, failure-free, fully operational and safe. They will also enable more activities to be carried out and provide new opportunities for solving problems. In view of the potential offered by ubiquitous computing and the challenges it raises, this work proposes a self-healing architecture to support ubiquitous applications aimed at healthcare The goal is to continuously provide reliable services to meet their requirements despite changes in the environment. We outline the application scenario and proposed architecture, as well as giving a detailed account of its main modules with particular emphasis on the fault detector.