The originality of the project lies in its multidisciplinary approach (dermatology, psychology, sociology). No such study has yet been carried out in the pemphigus who has been the subject of a very small number of works in sociology or psychology. The only studies are studies of quality of life with no longitudinal follow-up. The perspective of qualitative and quantitative data, sociological and psychological approaches, should allow more innovative and adapted to the medico-social and psychological care of patients with pemphigus approaches. The purpose of this study is to identify the determinants leading to moments of vulnerability in the course of patients with pemphigus in order to be able to offer preventive or corrective actions to improve the experience of the disease.