caused by mental/emotional disturbance, used to refer to physical symptoms, or relating to this phenomenon of physical symptoms being caused by mental factors (e.g. stress);
e.g. Her illness is psychosomatic, so she has been advised to seek therapy for her mental health.
(adjective)
relating to or involving both the mind and the body, or relating to the relationship or interaction between the two;
e.g. Doctors have decided to appeal to the psychosomatic nature of humans for a cure to his condition.