For several decades, authors are interested in the existence and meaning of painful symptoms in a population of psychiatric inpatients. But, to date, studies specifically focused on the impact of pain in patient populations in psychiatric hospitals are few. More recently, a review of the literature highlights the difficulties of evaluation of pain in populations of psychiatric patients but also the complex interrelationships between painful symptoms and psychiatric diseases. The first national survey conducted among 172 health which evaluate pain and its management in the field of psychiatry concluded on the need to develop research in this area.