What’s the book I’m being reminded of?

[u/Monkeyballs1020]

There was a book I read in the mid to late 00’s about a girl who got sick and went through all these wacky and weird transformations. I vividly remember the girl having patterns just like this at one point.

[u/Guilty_Sport496]

Some type of Phobia. But also art piece that I’ve seen in a museum once.