"We might think of the culture as possessing a 'symptom repertoire' -- a range of physical symptoms available to the unconscious mind for the physical expression of psychological conflict," Edward Shorter, a medical historian at the University of Toronto, wrote in his book "Paralysis: The Rise and Fall of a 'Hysterical' Symptom." "In some epochs, convulsions, the sudden inability to speak or terrible leg pain may loom prominently in the repertoire. In other epochs patients may draw chiefly upon such symptoms as abdominal pain, false estimates of body weight and enervating weakness as metaphors for conveying psychic stress."
[...] There is now good evidence to suggest that in the process of teaching the rest of the world to think like us, we've been exporting our Western "symptom repertoire" as well. That is, we've been changing not only the treatments but also the expression of mental illness in other cultures. Indeed, a handful of mental-health disorders - depression, post-traumatic stress disorder and anorexia among them - now appear to be spreading across cultures with the speed of contagious diseases. These symptom clusters are becoming the lingua franca of human suffering, replacing indigenous forms of mental illness.