Did some digging, and there are several people claiming to have been diagnosed with a 'water allergy'.
www.mirror.co.uk
www.express.co.uk
www.hertsad.co.uk
allindiaroundup.com
www.bbc.com
View: https://www.youtube.com/watch?v=emVez_hsqkM
This is a non-exhaustive list. https://www.allergycliniclondon.co.uk/aquagenic-urticaria-allergic-to-water/
These are all different people diagnosed with Aquagenic Urticaria. Some of them claim they only react to water on their skin but others claim that they also react internally to water (ie, IV saline, drinking) Reportedly, the diagnostic procedure for Aquagenic Urticaria specifically rules out chemicals in the water being the culprit, since after the patient still reacts to distilled/sterile water, that is when a diagnosis of Aquagenic Urticaria is confirmed. There are apparently less than 50 cases ever documented worldwide.
JUST ONE CUP OF WATER COULD KILL LITTLE HEIDI; Girl's deadly allergy means she cannot weep, wash, drink, play or even stand in the rain. - Free Online Library
Free Online Library: JUST ONE CUP OF WATER COULD KILL LITTLE HEIDI; Girl's deadly allergy means she cannot weep, wash, drink, play or even stand in the rain.(Features) by "The People (London, England)"; News, opinion and commentary General interest
www.thefreelibrary.com
Fears for tears: Girl allergic to water 'could DIE' if she cries
Painful skin disorder affects only 35 people in the world, leaving Katie Dell feeling like "a prisoner in her own home"


Mum reveals misery of water allergy that means even her own TEARS coul
A MUM has revealed how she is so allergic to water even her own TEARS could kill her.
St Albans woman speaks out about debilitating water allergy
A women who is allergic to water is reaching out to the St Albans community to raise awareness of the debilitating condition.

Woman Can't Cry, Wash, Drink Or Stand In The Rain Due To H20 Allergy
Heidi Falconer, 31, is one of the few people in the world born with aquagenic urticaria, a potentially fatal allergy to water.
socialnewsdaily.com

Student Who Is Allergic To Water Breaks Out In Rashes When She Sweats Or Cries
A 2-year-old student from California is allergic to water and she has opened up about her extremely rare condition. 21-year-old Tessa Hansen-Smith is diagnosed with “Aquagenic Urticaria”, a type of disease that causes her to…


The woman who is allergic to water
Rachel’s rare condition means that a bath is agony; even her own tears will scorch her face. How can the human body reject life’s most basic necessity?

This is a non-exhaustive list. https://www.allergycliniclondon.co.uk/aquagenic-urticaria-allergic-to-water/
These are all different people diagnosed with Aquagenic Urticaria. Some of them claim they only react to water on their skin but others claim that they also react internally to water (ie, IV saline, drinking) Reportedly, the diagnostic procedure for Aquagenic Urticaria specifically rules out chemicals in the water being the culprit, since after the patient still reacts to distilled/sterile water, that is when a diagnosis of Aquagenic Urticaria is confirmed. There are apparently less than 50 cases ever documented worldwide.