There are many things that can trigger a flare of eczema and these will vary from person to person.
Common triggers include irritants, allergens, stress, and infection. Some examples are listed below:
Irritants - e.g. soaps, shampoos, washing powder, perfume
Environmental factors or allergens - e.g. dust, changes in temperature, animal dander, pollen
Hormonal changes - e.g. periods, pregnancy
Certain materials against the skin - e.g. wool
Stress - e.g. emotional stress, exhaustion
Infections - e.g. viral infections