aquagenic

adjective

aqua·​gen·​ic ˌä-kwə-ˈje-nik, ˌa- 

: caused by water and especially by contact with water

Aquagenic urticaria is a rash caused by contact with water. It is exceedingly rare.

—Rebecca Coffey, Discover

Aquagenic pruritus is recurrent, intense, diffuse itching upon getting out of a bath or shower, and although no one knows the mechanism, it's a symptom of polycythemia vera, a rare condition in which the body produces too many red blood cells.

—Atul Gawande, The New Yorker