Hi rhyfedd. One suggestion I have is a metaphor for dysphoria that I may or may not have come up with on my own (I honestly can't remember if I had seen it somewhere before using it): being uncomfortable with your gender is like the feeling you get when wearing a shoe on the wrong foot. That "shoe" (gender role, expression, etc.) is not designed for that "foot" (person). And of course, you want to remove that shoe and put on the correct one. It's not a perfect comparison, but it may help your mom understand a little in language of something that she can experience firsthand.