The “atopic march”, also called the allergic march, describes the characteristic progression from atopic dermatitis (eczema) in infancy through food allergy, allergic rhinitis, and asthma in childhood. Understanding this progression has profound implications for how early eczema is managed.
The Sequence
The typical atopic march:
- Atopic dermatitis, usually the first manifestation, appearing in infancy or early childhood
- Food allergy, follows in a significant proportion of eczema children, particularly IgE-mediated allergies to peanut, egg, milk, wheat, and soy
- Allergic rhinitis, nasal allergies developing in mid-childhood
- Allergic asthma, airway inflammation with wheeze, often in school-age children
Not all children progress through every step. Approximately 30–40% of children with moderate-to-severe atopic dermatitis develop asthma. Those with severe early eczema and concurrent food allergy have the highest risk.
Why Does Eczema Come First?
The skin barrier hypothesis provides the most compelling explanation. In atopic dermatitis, a compromised skin barrier allows environmental allergens to penetrate the skin and be presented to immune cells in a sensitizing manner.
This cutaneous sensitization programs the immune system toward a Th2-biased response, the same profile that drives food allergy, rhinitis, and asthma.
Prevention Implications
Early peanut introduction (the LEAP trial) significantly reduced peanut allergy in high-risk infants, with eczema being a major risk factor. Intensive emollient therapy in eczema-prone infants may be protective against the downstream atopic march.
Early, aggressive skin barrier support in eczema-prone infants is now seen as potentially protective. Consistent moisturizing and treating active eczema should begin as early as possible.
Contact NuLine about atopic dermatitis clinical trials for children and adults.