What is this article about?
The exact cause of eczema is not known, but it’s thought to be a combination of environmental triggers and genetic factors. People who have eczema have an overactive immune system that produces inflammation when triggered by a substance inside or outside of the body. A person is more likely to develop eczema if they have a family history of eczema or allergic conditions, such as allergic rhinitis (hay fever) or asthma.
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