Résumé : ObjectiveChronic musculoskeletal pain (CMSP) is frequent in chronic diseases, decreasing the quality of life of these patients. In a survey conducted in Belgium in 2019, chronic pain was named by patients as the main factor of complexity in their lives. The objective of our research was to provide elements to understand why and how CMSP contributes to the complexity of these people's lives.DesignQualitative study through semi-structured interviews.SettingThe study was conducted in Belgium with French-speaking individuals. The interviews took place at the university, in a teaching hospital, in private clinics or in individuals’ homes.ParticipantsWe included 24 individuals with CMSP and living complex situations. The recruitment was made in two phases in agreement with the grounded theory methodology and to reach the saturation of ideas.Results The complexity experienced by people with CMSP turns around the notion of recognition, which can be broken down into 3 spheres: intimate, social and legal. The poor quality of listening and the fragmented vision of aid and care professionals generate a feeling of loneliness and incomprehension in the face of illness. The unsuitability of the world of work, the opacity of protocols and the attitude of medical experts reveal inequalities in access to recognition for immigrants and people of low socio-professional status.ConclusionThe complexity of the situations experienced could be reduced by implementing health policies that facilitate: legal recognition of this illness; adaptability in the workplace; raising awareness about pain mechanisms, the risks of stigmatization and the need of interprofessional collaboration.