In this paper, we bring together Foucault's biography and oeuvre to explore key concepts that support the analysis of nurses' acts of resistance. Foucault reflected on the power relations taking place in health services, making his contribution especially useful for the analysis of resistance in this context. Over three decades, he proposed a nonnormative philosophy while concomitantly engaging in transgressive practices guided by values such as human rights and social justice. Hence, Foucault's philosophy and public activism are an apparent contradiction, (...) but we argue that when analysed together they allow for a different understanding of his work. We describe the evolution of the concept of resistance in Foucault's work, supported by the approaches of Brent Picket (1996) and Miguel Morey (2013). Foucault started his work considering the idea of transgressiveness as it connects to being at the margins of society. He then spent considerable time elaborating the concept of power and identifying resistance strategies as forms of power exercise. In doing so, he considered that people engage with social change from multiple positions, including limited desire for change, fomenting reforms, or engaging in everyday revolutionary acts. As he further elaborated on power relations and defined resistance, Foucault asserted that resistance involves both repressive and productive dimensions of power, governance of biological life, state governance, and deliberate practices of illegalisms. Finally, Foucault shifted his attention to the freedom of ethical subjects, proposing the use of counter‐conduct and counter‐discourses to speak truth against oppression. Such framework offers a comprehensive lens for analysing nurses' acts of resistance within the complexities of the healthcare system and in society. In summary, Foucault's conceptual framework on resistance expands the role of nurses, to understand them not only as caregivers, but also as political agents capable of confronting and transforming oppressive institutional practices. (shrink)