Eczema in Children: The First Step of the Allergic March (And How to Break It)

For many parents, their child's allergic journey begins quietly, with patches of dry, red, intensely itchy skin in infancy. This is eczema (atopic dermatitis), and while it is often dismissed as 'just dry skin,' it is frequently the opening chapter of a predictable sequence that allergists call the 'allergic march.' Recognising this pattern early gives parents a powerful opportunity to intervene before more serious allergic conditions develop.

What Is the Allergic March?

The allergic march (or atopic march) describes the typical progression of allergic diseases as a child grows. It does not occur in every child, but the classic sequence is well established:

• Infancy: Atopic dermatitis (eczema) and sometimes food allergy appear first, often in the first year of life.
• Toddler & Preschool Years: Food allergies may become more apparent, while eczema may persist or fluctuate.
• Childhood: Allergic rhinitis (hay fever) and allergic conjunctivitis emerge, with sneezing, congestion, and itchy eyes.
• Later Childhood: Allergic asthma may develop, completing the march from skin to airways.

“Eczema is not just a skin problem, it is a window into a child's immune system. A damaged skin barrier is one of the routes through which the body becomes sensitised to allergens, setting the stage for food allergy and asthma.”— Dr. Sunita Chhapola Shukla

Why the Skin Barrier Matters So Much

Modern research has reshaped how we understand eczema. We now know that a defective skin barrier, often linked to genetics, allows moisture to escape and allows allergens from the environment to penetrate the skin. When the immune system encounters food and environmental proteins through inflamed, broken skin rather than through the gut, it is more likely to become sensitised and treat them as threats. This 'outside-in' theory explains why diligent skin barrier care in infancy is now considered one of the most important early interventions in allergic disease.

How Parents Can Help Break the March

While not every step of the march can be prevented, early and consistent action can reduce its severity and progression:

• Aggressive Moisturisation: Liberal, frequent use of fragrance-free emollients repairs and protects the skin barrier and is the cornerstone of eczema control.
• Control Flares Early: Use prescribed anti-inflammatory treatments promptly during flares rather than letting the skin stay inflamed for long periods.
• Identify Genuine Triggers: Work with a specialist to identify true allergic triggers, rather than removing foods unnecessarily, which can backfire and increase allergy risk.
• Avoid Unnecessary Food Elimination: Restricting major foods 'just in case' can deprive a child of nutrition and may actually raise the risk of developing a true allergy to those foods.
• Monitor for Airway Symptoms: Watch for the emergence of recurrent sneezing, congestion, or cough that may signal the march progressing to the airways.

The Role of Allergy Testing in Children with Eczema

Not every child with eczema needs allergy testing, but it becomes valuable when eczema is moderate-to-severe, when there are clear reactions to specific foods, or when airway symptoms begin to appear. A carefully chosen Skin Prick Test or allergy blood test can identify relevant triggers and, just as importantly, rule out suspected ones, preventing needless dietary restriction. Where an allergic airway component develops, allergen immunotherapy has been shown to reduce the progression of rhinitis into asthma, directly interrupting the march.

When to See an Allergist

Consider a specialist evaluation if your child's eczema is severe or poorly controlled, if you suspect specific food triggers, if there is a strong family history of allergies, or if your child is beginning to show nasal or chest symptoms. Early, expert guidance at our Dadar clinic can help protect your child's skin, nutrition, and long-term respiratory health.