Education Resource Center: What Causes Eczema
The exact cause of eczema is unknown. You might have inherited a tendency for eczema. You may have a family member who has eczema or who has hay fever (allergic rhinitis) or asthma. Many doctors think eczema is linked to allergic disease, such as hay fever or asthma. Doctors call this the atopic triad. Many children with eczema (up to 80%) will develop hay fever and/or asthma.