Well, she is "cute" but she obviously looked much better in 2016.
It is difficult to document her life but I tried to follow up on social media (Twitter, Instagram) despite her deleting them regularly and fake accounts coming up all the time.
I think (Just speculation) that it is not a physical condition. I think she has body dysphoria (On top of her gender dysphoria) because what I have seen throughout the years was her losing weight and posting lots of gym pics. So it's probably a very strict diet and exercise.
Some people also think she has been on and off dating someone (Because she very rarely post BG snippets).
IMO she just needs to gain maybe 5-10 pounds and that's it.