Idiopathic Hypereosinophilic Syndrome, or HES, is a rare group of disorders. People living with HES have a large amount of white blood cells, called eosinophils, in the blood and tissue for no apparent reason. When there is a buildup of eosinophils in the blood and tissue, these cells release toxins that can damage organs. The buildup of eosinophils can happen in the heart, central nervous system, blood, lungs, skin, stomach and intestines.

Please read on to learn more about the symptoms of HES and how it is diagnosed.

HESresource.com is a dedicated resource aimed at providing information about idiopathic Hypereosinophilic Syndrome (HES), a group of rare disorders involving a certain type of white blood cell.

Early recognition of the disease and accurate diagnosis are essential since HES can be damaging to the body, causing damage to organ tissue and even death in some cases.

This Web site can help you learn more about HES and ways you, a family member, or friend can manage the disease. You can also hear the personal experiences of people currently living with the disorder.

Thank you for your interest in learning more about HES.

This site is brought to you by GlaxoSmithKline, a leader in educating people about HES.