BackgroundBreast cancer is the most prevalent cancer for women in Nigeria, representing 25% of all cancers in women. How do women self‐identify with the new realities of living with breast cancer before, during and after treatment?AimsThis study aims to examine the self‐identities of 22 women with breast cancer in Nigeria.MethodsThe paper relies on grounded theory research method to collect data, analyse and capture the processes of self‐identity formation.ResultsThe qualitative data analysis reveals the basic social process within symbolic interactionism that describes how breast cancer survivors perceive their agency and how new self‐identities emerged from the new normal of living with breast cancer. A framework of three self‐identities emerged from the data: (1) valued self‐identity before breast cancer, (2) dependent and determined self‐identities during treatment and (3) devalued self‐identity post‐treatment.ConclusionThis study should help caregivers understand the profound perpetual psycho‐emotional impact that breast cancer has on sufferers and survivors.