Social vulnerability often leads to the expression of psychological distress. The Health Examination Center of Côtes d'Armor, in Quimper, experimented with the development and implementation of psychological counseling for a highly socio-economically vulnerable population. As part of a periodic health examination, the center offers psychological counseling to patients with pathological sleep disorders and who lack sufficient psychological support. The Health Examination Center's framework and the context of the periodic health examination have facilitated the establishment of a tailored non-stigmatizing intervention well-embedded within the institutional environment. Marginalized people in situations of psychological distress are offered an opportunity to be listened to, and to receive counseling, appropriate prevention services and access to care.