What causes aquagenic pruritus?

What causes aquagenic pruritus?

It can occur without an apparent cause (idiopathic) or as a symptom of another condition.

Nearly two-thirds of people with polycythemia vera have aquagenic pruritus. This is a potentially serious condition where your body makes too many red blood cells. Aquagenic pruritus may also occur with other medical conditions like:

• Chronic urticaria or chronic hives.
• Hypereosinophilic syndrome, a group of blood disorders that result from having too many eosinophils, a type of white blood cell.
• Myelodysplastic syndromes and other blood cancers.