In this article I aim at developing a phenomenology ofillness through a critical interpretation of the worksof Sigmund Freud and Martin Heidegger. The phenomenonof ``Unheimlichkeit'' – uncanniness and unhomelikeness– is demonstrated not only to play a key role in thetheories of Freud and Heidegger, but also toconstitute the essence of the experience of illness.Two different modes of unhomelikeness – ``The minduncanny'' and ``The world uncanny'' – are in thisconnection explored as constitutive parts of thephenomenon of illness. The consequence I draw (...) fromthis analysis is that the mission of health careprofessionals must be not only to cure diseases, butactually, through devoting attention to thebeing-in-the-world of the patient, also to open uppossible paths back to homelikeness. This mission canonly be carried out if medicine acknowledges the basicimportance of the meaning-realm of the patient's life– his or her life-world characteristics. (shrink)