Although undocumented students face numerous stressors that can lead to mental health strain, they often underutilize their campus mental health services. To identify the barriers and motivations for talking to a campus mental health professional (MHP) and to extend the Health Belief Model (HBM), we conducted semi-structured interviews with 24 Latina/o/x undocumented college students. Family communication revealed views that undermined talking to an MHP, but that were deeply rooted in culture and immigration; having to prioritize basic needs; and growing up in an environment where mental health services were unavailable. Our findings reveal important communication, cultural, and structural elements that should be emphasized in the HBM when explicating Latina/o/x undocumented students' beliefs and behaviors about talking to an MHP.