Mental health crisis situations: the nurse's work in Primary Health Care.

Objective: to analyze the nurses' work in Primary Health Care in the face of mental health crisis situations.

Method: this is a descriptive-exploratory study with a qualitative approach, supported by the theoretical-interpretive frameworks of behavior analysis and historical-dialectical materialism. The data was collected through a semi-structured interview with twelve Primary Health Care nurses and analyzed using the deductive technique proposed by the Theorical Domains Framework, the methodological reference adopted.