In this paper I explore the tacit underlying sense of bodily certainty that characterizes normal everyday embodied experience. I then propose illness as one instance in which this certainty breaks down and is replaced by bodily doubt. I characterize bodily doubt as radically modifying
our experience in three ways: loss of continuity, loss of transparency, and loss of faith in one's body. I then discuss the philosophical insights that arise from the experience of bodily doubt. The paper uses a Humean framework with regards to bodily certainty, treating it as a taken
for granted tacit aspect of normal experience. I argue that although bodily certainty is not rationally justifiable, we are nonetheless unable to reject it. Bodily certainty is thus revealed to be part of our brute animal nature. I conclude by suggesting that the study of pathology is a philosophical
method useful for illuminating tacit aspects of experience.