Should Your Child Undergo Allergy Testing After Multiple Reactions? - Pediatrics

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When it comes to determining whether your child should undergo allergy testing after experiencing multiple allergic reactions, there are several factors to consider. Based on the information you've provided, your child has had two allergic reactions within a short span of time, both characterized by the development of red, itchy rashes. This pattern of reactions raises valid concerns about potential food allergies or sensitivities.


Understanding Allergic Reactions
Allergic reactions can manifest in various ways, including skin rashes, hives, gastrointestinal symptoms, or respiratory issues. The fact that your child has experienced two reactions in such a short period suggests that there may be a specific allergen involved. Common allergens in children include milk, eggs, peanuts, tree nuts, soy, wheat, fish, and shellfish. In your child's case, the foods consumed during the reactions included milk, which is a known allergen, as well as other potential triggers like soy (tofu) and wheat (rye bread).


When to Consider Allergy Testing
1. Frequency of Reactions: Given that your child has had two allergic reactions within 15 days, it is reasonable to consider allergy testing. This is especially true if the reactions were severe or if they are likely to occur again upon exposure to the same foods.

2. Severity of Symptoms: If the allergic reactions involved significant discomfort, such as extensive itching or widespread rashes, this further supports the need for testing.

3. Family History: If there is a family history of allergies, asthma, or eczema, this may increase the likelihood of your child having allergies as well.

4. Consultation with a Specialist: While the initial physician you consulted may have deemed testing unnecessary, it is important to seek a second opinion, especially from an allergist or immunologist. These specialists can provide a more comprehensive evaluation and determine the appropriateness of allergy testing.


Types of Allergy Testing
There are generally two types of allergy tests that can be performed:
1. Skin Prick Test: This involves placing small amounts of allergens on the skin and pricking the skin to see if a reaction occurs. It is quick and can test multiple allergens at once.

2. Blood Test (RAST or ImmunoCAP): This test measures the immune system's response to specific allergens by checking for the presence of IgE antibodies in the blood.


Cost and Availability of Testing
The cost of allergy testing can vary widely depending on the type of test and the number of allergens tested. Typically, skin tests may range from $60 to $300, while blood tests can be more expensive, sometimes exceeding $500 depending on the complexity of the testing.
In terms of where to go for testing, you should look for an allergist or a pediatric allergist in your area. Since you mentioned living in Keelung, you can check local hospitals or clinics that specialize in allergy and immunology. Many larger hospitals have dedicated allergy departments.


Conclusion
In summary, given your child's recent allergic reactions, it is advisable to pursue allergy testing to identify potential allergens. This will not only help in managing your child's current symptoms but also in preventing future reactions. Consult with a pediatric allergist who can provide a thorough evaluation and guide you through the testing process. Early identification of allergens can significantly improve your child's quality of life and reduce the risk of severe allergic reactions in the future.