If a hive forms within a few minutes, the person has AU. Idiopathic aquagenic pruritus (IAP) is a rare condition that causes a person’s skin to itch after it gets water on it. However ...

Aquagenic urticaria is a rare condition where people have an allergic skin reaction to water. The reaction typically involves hives and bumps and can occur as often as several times a day.

Notably, drinking water does not trigger this reaction. Another related condition, aquagenic pruritus (AP), causes intense ...