Population study on egg allergy in infants and small children, characterisation of its clinical symptoms and its relation to atopic eczema and to the natural course of atopic march, has not been published yet in the Czech Republic. In our cohort we proved that the egg allergy is closely linked to the early onset of allergic symptoms, to a severe form of atopic eczema, to a sensibilization to inhaled allergens with the presence of allergic rhinitis and/or allergic asthma.