This article is part of our What Are Allergies resource center, covering all aspects of what are allergies diagnosis, treatment, and management.
Quick Answer
Allergic conditions are among the most common chronic conditions in children. They include food allergy, eczema (atopic dermatitis), seasonal and year-round allergic rhinitis, and allergic asthma. Each condition has distinct triggers, onset patterns, and management approaches. Evaluation by a pediatrician or allergist is important when symptoms are frequent, severe, or affecting daily function and school attendance.
Understanding allergy in children starts with recognizing that not all allergic conditions are the same. Allergic disease in pediatric patients can involve the skin, respiratory tract, gastrointestinal system, or multiple organ systems — and the pattern changes as children grow.
Food Allergy in Children
Food allergy is most common in infancy and early childhood. The most frequently implicated foods in children include milk, egg, peanut, tree nuts, wheat, soy, fish, and shellfish. Reactions can range from mild hives or gastrointestinal symptoms to anaphylaxis. Many children with milk or egg allergy outgrow these over time; peanut and tree nut allergy more often persist into adulthood.
Current clinical guidelines from NIAID and major allergy organizations recommend early introduction of highly allergenic foods — including peanut — during infancy for most infants, as this strategy is associated with a lower likelihood of developing allergy. Parents should consult their pediatrician or an allergist before introducing allergenic foods if a child already has eczema or another food allergy, as timing and approach may differ for higher-risk infants.
Food allergy is not diagnosed by testing alone. A positive test result indicates sensitization; confirming clinical allergy requires integrating the test result with the child's history and, when needed, a supervised oral food challenge. See our food allergies hub for detailed information.
Seasonal and Environmental Allergic Rhinitis
Seasonal allergic rhinitis typically emerges in children between ages 3 and 5, after enough seasons of allergen exposure for sensitization to develop. Common triggers include tree, grass, and weed pollen. Year-round (perennial) rhinitis is caused by indoor allergens such as dust mites, pet dander, and mold. Symptoms include nasal congestion, runny nose, sneezing, and itchy eyes — which can significantly affect sleep quality, concentration, and school performance.
Children with allergic rhinitis often rub their nose upward ("allergic salute"), develop a transverse nasal crease, and may have visible shadows under the eyes ("allergic shiners") from chronic nasal congestion. These patterns help clinicians distinguish allergic rhinitis from recurrent colds.
Eczema and Allergic Disease
Atopic dermatitis (eczema) is often the first allergic condition to appear in infants. It presents as itchy, inflamed patches of skin, typically on the cheeks, scalp, and flexural areas (inner elbows, behind knees). Eczema is associated with skin barrier impairment and immune dysregulation. Many children with eczema also develop or have a higher likelihood of developing food allergy, allergic rhinitis, or asthma. This pattern is sometimes referred to as the "atopic march" — however, it is a tendency, not an inevitable progression. Many children with eczema do not go on to develop other atopic conditions. See our dedicated atopic dermatitis guide for management information.
Asthma Overlap
Asthma is the most common chronic respiratory condition in children in many countries. In children with allergic sensitization, asthma exacerbations are often triggered by the same allergens that cause rhinitis — particularly dust mites, pet dander, mold, and cockroach allergen. Viral upper respiratory infections are also a very common asthma trigger in children. When a child has both allergic rhinitis and asthma, treating nasal inflammation often helps improve asthma control. Managing both conditions together is a common clinical approach.
Symptoms by Body System
| System | Typical Symptoms |
|---|---|
| Skin | Hives (urticaria), eczema flares, contact rash, angioedema (swelling) |
| Nasal/eye | Sneezing, runny nose, nasal congestion, itchy and watery eyes |
| Respiratory | Wheezing, coughing (especially at night or with exercise), chest tightness |
| Gastrointestinal | Vomiting, abdominal pain, diarrhea (especially after food exposure) |
Symptoms That May Resemble Allergy
Not all runny noses, rashes, or breathing difficulties in children are allergic. Recurrent viral upper respiratory infections are very common in young children and can mimic perennial allergic rhinitis. Non-allergic food intolerances (such as lactose intolerance) can cause gastrointestinal symptoms that may be mistaken for food allergy. Viral-triggered wheezing in toddlers is common and does not always indicate underlying asthma or allergy. A pediatrician or allergist can help distinguish allergic from non-allergic causes.
Diagnosis and Testing
Allergy testing in children follows the same principles as in adults. Skin prick testing and allergen-specific IgE blood tests are used to identify sensitization. Younger children may have smaller skin test wheals, and testing reliability improves with age. A positive test must always be interpreted alongside the clinical history. Testing for food allergy is most meaningful when there is a clear clinical history of reactions; broad food panels without a specific clinical reason are generally not recommended, as they generate many false positives that can lead to unnecessary dietary restrictions. Speak with an allergist to determine what testing is appropriate for your child's specific situation.
Medication Safety Principles
Many allergy medications have age-specific approvals. Always check the product labeling or consult a pharmacist or clinician before giving allergy medications to a child. Do not estimate a dose based on adult dosing without verification. Some OTC antihistamines are approved for young children; others are not. Intranasal corticosteroids also have varying minimum age approvals. For children with a food allergy and a history of anaphylaxis, an epinephrine auto-injector should be prescribed in an age-appropriate device size — consult the prescribing clinician about the correct formulation and dose.
School and Childcare Planning
Managing allergy at school and in childcare requires coordination between families, healthcare providers, and school staff. See our school allergy safety guide for information on 504 plans, emergency action plans, and staff training. Key steps include providing the school with an up-to-date, physician-signed emergency action plan, ensuring staff know how to use an epinephrine auto-injector, and establishing clear protocols for cafeteria and outdoor activities.
Emergency Action Plans
Any child who has been prescribed an epinephrine auto-injector for anaphylaxis risk should have a written emergency action plan. This document specifies symptoms that trigger each step of the response, which medications to give and in what order, and when to call emergency services. The plan should be updated at each annual visit and filed with every setting where the child spends time — school, childcare, camp, sports team. See the food allergy emergency guide for a detailed overview of anaphylaxis recognition and response.
Developmental and Emotional Considerations
Children with allergies — particularly food allergy — may experience anxiety about eating outside the home, fear of reactions, and social isolation when they cannot participate in shared food activities. These concerns are real and can affect quality of life. Age-appropriate education helps children understand their condition and participate in their own safety planning. Adolescents in particular benefit from gradually taking on more responsibility for managing their own allergy. If anxiety is significant, a referral to a mental health professional with pediatric experience can be helpful.
When to Consult a Pediatrician or Allergist
Seek evaluation if your child has: symptoms after eating a specific food, especially involving hives, vomiting, or difficulty breathing; persistent or seasonal nasal symptoms that affect sleep, school, or daily function; eczema that is not well controlled with standard treatments; recurrent wheezing or a confirmed or suspected diagnosis of asthma; or if you have questions about early food introduction given a family history of food allergy. A board-certified allergist can confirm diagnoses, identify triggers through testing, and design a management plan appropriate for your child's age and condition.