What Is Hyperosinophilia

Overview. Hypereosinophilic (hy-per-ee-o-SIN-o-phil-ik) syndrome (HES) is a group of blood disorders that occur when you have high numbers of eosinophils — white blood cells that play an important role in your immune system. Over time, the excess eosinophils enter various tissues, eventually damaging your organs.

What is the cause of eosinophilia?

Having a high number of eosinophils, a specific type of white blood cell, is called eosinophilia. It can be caused by common things like nasal allergy or more serious conditions, such as cancer. It is discovered by blood testing.

What are the symptoms of HES?

• Skin rashes such as urticaria or angioedema.
• Dizziness.
• Memory loss or confusion.
• Cough.
• Shortness of breath.
• Fatigue.
• Fever.
• Mouth sores.