FLG and Eczematoid dermatitis: There is clearly a genetic component involving skin barrier proteins such as filaggrin,4 but previous studies have highlighted the need to investigate further the social and environmental factors associated with the development of childhood eczema.5 Given the large public health burden and unclear risk factor profile, it is important that studies identify potentially modifiable risk factors for eczema that are amenable to public health intervention, and there is increasing evidence that early‐life environmental exposures may be particularly important.6