Desensitization does not seem to work for<unk> ; a patient will continue to react to water no matter how gradually or frequently it is introduced. Topical application of antihistamines like 1% diphenhydramine before water exposure is reported to reduce the hives. Oil in water emulsion creams, or petrolatum, applied as barrier agents prior to a shower or bath may control symptoms. Therapeutic effectiveness of various classes of drugs differs from case to case.
Aquagenic urticaria
Cold urticaria
Solar urticaria
Cholinergic urticaria
Heat urticaria
Pressure urticaria
Delayed pressure urticaria
Adrenergic urticaria