It reminds me of the notion proposed by the medical historian Edward Shorter, used mostly in relation to mental illnesses, that each society has its own culturally determined 'symptom pool', into which we all subconsciously dip when something is wrong in order to manifest the wrongness. The specific time and place of 'outbreaks' of various conditions such as bulimia seems to bear this out. Also depression and psychosis are treated and express themselves very differently across cultures (ours with our psychiatrists and SSRIs and anti-psychotics seems to fare rather badly in comparison with some others). Some conditions, such as clinical depression, are pushed within a medical model basically in order to push drugs on us, and we respond by providing the symptoms that are expected of us. This is difficult to talk about in this context because I have no intention to be hurtful or to try to downplay the reality of gender dysphoria, but Shorter has traced the history of this kind of process with various conditions.