Why is there a lot of medical literature on how your lungs are allergic to water but nothing about being allergic to water in your blood?

For example secondary drowning is where you inhale a tiny bit of water and the immune system of your lungs freaks out and causes them to swell up. there's lots of medical literature on this.

there's a girl who gets into the news often by claiming she is allergic to water every where in her body including all of her internal organs and a sip of water sends her into anaphylaxis. she says she cannot even get intravenous saline since she's allergic to water molecules in her blood too. but i cannot find any medical literature on this at all. she has been advertising this autobiography book deal she claims to have been writing since she was 12 (she is now 31).