Allergic Rhinitis

Allergic rhinitis (hay fever) is IgE-driven inflammation of the nasal lining. It causes sneezing, a runny or blocked nose and often itchy eyes (Conjunctivitis), triggered by airborne allergens such as Pollen and House Dust Mites. It is the usual “last step” in the classic Atopic March and often appears in later childhood rather than toddlerhood. It matters for eczema diagnosis too. In NICE CG57’s criteria, a personal history of asthma or allergic rhinitis counts toward diagnosing atopic eczema. In children under 4, a history in a first-degree relative counts instead.

Atopic Dermatitis [precedes] Allergic Rhinitis Pollen [triggers] Allergic Rhinitis House Dust Mites [triggers] Allergic Rhinitis

How often eczema leads to hay fever. Hay fever is the most common later allergic condition after childhood eczema. In the Swedish BAMSE cohort (Ballardini 2014), 43.9% of children with persistent infantile eczema had rhinitis at age 12. More of them had rhinitis than still had eczema (33.3%) or had asthma (17.2%). Other cohorts reviewed in Medicina 2024 show raised risk after early AD: aOR 2.63 in Swedish DBH, and a relative risk of 4.44 by age 3 in Canadian CHILD. Of children with Asthma, 74–81% also have allergic rhinitis. In Belgrave’s latent-class analysis, “persistent eczema with later-onset rhinitis” (4.7% of children) was a more common pattern than the full march (3.1%).

BAMSE [supports] Allergic Rhinitis Eczema Prognosis [relates] Allergic Rhinitis

What it means for a toddler with eczema. Persistent eczema raises the chance of hay fever later. As with asthma, though, no trial shows that better eczema treatment prevents it. Preventive sublingual immunotherapy has not shown enough benefit for routine use (Medicina 2024; see Eczema Prognosis). When a child has both conditions, seasonal pollen or dust-mite exposure can worsen both the nose and the skin at once (see Environmental Triggers). Non-sedating Oral Antihistamines treat hay fever symptoms but do little for eczema itch itself.

Oral Antihistamines [treats] Allergic Rhinitis Allergic Rhinitis [relates] Asthma

Connections

• Atopic Dermatitis — later comorbidity, source: Medicina 2024; NICE CG57
• Atopic March — classic final step; only ~7% of symptomatic children follow the full sequence, source: Belgrave 2014
• Eczema Prognosis — 43.9% have rhinitis at 12 after persistent infantile eczema, source: Ballardini 2014
• BAMSE — Swedish cohort quantifying eczema → rhinitis, source: Ballardini 2014
• Asthma — 74–81% of asthmatic children also have AR, source: Medicina 2024
• Pollen — seasonal airborne trigger, source: Pollen note
• House Dust Mites — perennial airborne trigger, source: House Dust Mites note
• Oral Antihistamines — treat hay-fever symptoms more than eczema itch, source: Oral Antihistamines note