This document discusses the social construction of health and illness. It introduces sociological theories of illness such as Talcott Parsons' sick role and Eliot Freidson's types of illness. The sick role refers to the behaviors expected of those who are ill, including being exempt from normal duties but also obligated to seek treatment. Freidson identified conditional, legitimate, and illegitimate sick roles depending on the seriousness and stigma of different illnesses. The social construction of health and illness has changed over time and varies between cultures.