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Allergology · Food allergies

Food allergies in children

Food allergies in children are an abnormal reaction of the immune system after eating a particular food. They most often appear in early childhood, sometimes in the first months of life, and can change as the child grows.

Written by Dr A. Turcarelli, dermatologist and allergist Updated 5 January 2026 5 min read

Allergies alimentaires chez l’enfant

Introduction

Early care helps limit the risks and supports the child and family safely.

Symptoms

  • Skin redness, hives, worsening eczema
  • Swelling of the lips, eyelids or face
  • Vomiting, diarrhoea, abdominal pain
  • Refusing food, crying regularly after meals
  • Cough, wheezing, difficulty breathing
  • Feeling faint, pallor
  • In severe forms: anaphylactic reaction

Causes

IgE-mediated immune reaction
Immature digestive and immune systems
Family history of atopy (eczema, asthma, allergic rhinitis)
Introduction of certain foods in infants
Cross-reactions (less common in young children)

Diagnosis

  1. Detailed history from the parents
  2. Analysis of the timing between eating and symptoms
  3. Clinical examination of the child
  4. Age-appropriate skin prick tests
  5. Specific IgE testing
  6. Oral food challenges if needed, carried out in a safe medical setting

Treatments

Targeted avoidance of the food responsible
Suitable nutritional substitutes (growth, balanced diet)
Treatment of acute reactions (antihistamines, corticosteroids)
Prescription of an adrenaline auto-injector if there is a risk of severe reaction
Information and training for parents and carers (nursery, school)
adrenaline auto-injector

Management

Confirm or rule out a food allergy

Avoid unnecessary exclusion diets

Ensure healthy growth

Organise follow-up adapted to the child as they grow

Frequently asked questions

Consultation for food allergies in children

Consultation with a confirmed diagnosis and a written treatment plan.

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