The purpose of this paper is to expand the understanding of tile concept of pain. The authors intent to clarify the defining attributes of pain and identify antecedents that influence the perception of pain and the possible consequences of pain by using Walker and Avant's (1995) concept analysis. A model case demonstrates how pain is tied to these critical attributes. A borderline case and a contrary case are presented to differentiate the concept of pain from other concepts. Empirical referents demonstrate the current perspective of the concept of pain.