22 Hard-To-Detect Illnesses, From The Commonplace To The Truly Bizarre

20. Aquagenic Urticaria

Also known as water allergy, aquagenic urticaria is a rarely diagnosed disease whose defining symptom is an itchy skin reaction resulting from contact with water. This allergic reaction can include hives that appear within minutes after the body comes in contact with water. The causes of this disease is still somewhat of a mystery, although the result effects from a life spent being unable to shower seem impossible to ignore.