http://waltheyer.typepad.com/blog/2015/06/627-of-transgenders-have-untreated-mental-disorders.html
This site was put up by a transgender who got the surgery & later regretted it.  There are many other sites with similar info.  If you are interested you can find them on your own.  Many psychologists & psychiatrists who aren't motivated by politics agree gender identity most often is a symptom of an underlying psychological disorder or the individual was brainwashed as a  child