@MissScarletInTheBallroom posted a great post on another thread where (and I trust it is okay to quote), she said:
Secondly, you say it's not a mental illness. Why do you think this? It's not a physical illness. Prior to receiving any kind of "treatment", trans people's bodies are perfectly ordinary and as healthy as anyone else's. Their dysphoria (if they have dysphoria) is a feeling in their head. A feeling which apparently makes them so miserable that they want to change everything about who they are, even to the point of having irreversible medical interventions which harm their physical health but may allow them to superficially resemble a member of the opposite sex. How is that not a mental illness?
I think it very much is a mental illness, and I cannot think of any other example of where we harm the physical body to try to make it "match" what is going on in the person's brain, rather than attempting to actually treat the mental illness.
Brilliantly put... the simple reality with the trans discussion is that so much of the cause / reasons / solution lies in the mental health area - but as a society we stigmatise the phrasing 'Mental Illness' to the point that even though it would be helpful to the individual, we find any alternative to avoid that categorisation...
In many ways, the actions taking place in the trans world (self-mutilation / coercive behaviour against women / denial of truth and biology) are all mental health or mental illness related...
If we were able to re-frame mental illness so that it was seen as being valuable to treat it - would that not of itself go a long way to ironing out the issues / self-deceptions / lies etc. that we are seeing...
For those with Body Dysmorphia - treat the mental illness - for those with Autogynephilia - again, there is a mental illness to deal with...
Society's current framing of mental illness as being degrading / and stigmatised is unhelpful to all - if we could find ways to reposition it so that it was seen as acceptable to have a mental health issue - and to deal with it, then we might help a number of other issues along the way.