Unmitigated communion (UC), the prioritisation of others’ needs over one’s own well-being, is a critical lens for understanding the mental health of female migrants. This qualitative study explores how UC intersects with constructions of strength and vulnerability within this population, particularly amid challenges such as adaptation, discrimination, and gendered roles. Using a feminist participatory methodology, the study was co-produced with 10 migrant women and three professionals. Semi-structured interviews were conducted with 18 female migrants from 13 countries, representing diverse languages, cultures, and lengths of stay in the UK. Data were thematically analysed using the Engaging Marginalised Communities by Building Relationships and Knowledge (EMBaRK) framework, which centres lived experience and equitable collaboration. Through this analytic process, three key themes were generated: (1) perceived strength and resilience shaped by societal pressures and internalised self-reliance; (2) gender roles and self-sacrifice, including traditional caregiving expectations and neglect of personal health; and (3) isolation and reluctance to seek support, marked by concealed mental health struggles and stigma. Participants’ narratives revealed shared tensions between resilience and vulnerability. The findings highlight the central role of unmitigated communion in shaping migrant women’s mental health and underscore the need for gender-responsive, culturally informed interventions that support women to balance caregiving with self-care.