Question: is there such a thing as a water allergy

Answer: Yes, Aquagenic urticaria, also known as water allergy and water urticaria, is a rarely diagnosed form of physical urticaria. The defining symptom is an itchy skin reaction resulting from contact with water, regardless of its temperature. It is sometimes described as an allergy, although it is not a true histamine-releasing allergic reaction like other forms of urticaria. This seems to not be affected by different temperatures of water, such as cold or hot, or chemicals such as fluorine and chlorine, since it is reproduced with distilled water and medical saline.