Food allergy
I experienced multiple areas of severe itching last week due to a food allergy, and I was diagnosed with urticaria at your hospital.
I am now 90% healed.
Since the rash was caused by food, but I do not know which specific food triggered it, can I undergo a blood test to identify the allergens to prevent a recurrence of this condition? Additionally, is there insurance coverage for allergen testing? Thank you!
VC, 20~29 year old female. Ask Date: 2004/11/01
Dr. Chen Yiying reply Dermatology
Hello: In response to your question...
Generally speaking, allergens for urticaria are not easily tested through blood tests.
Currently, allergen testing primarily focuses on asthma, allergic rhinitis, and atopic dermatitis, which have reference value.
For food allergies related to urticaria, it may be more accurate for you to monitor them yourself rather than relying on blood tests.
Keelung Hospital, Department of Health, Executive Yuan, Chen Yi-Ying.
Reply Date: 2004/11/01
More Info
Identifying food allergies can be a complex process, especially when symptoms like hives (urticaria) arise unexpectedly. It’s great to hear that you are on the path to recovery, but understanding the underlying cause of your allergic reaction is crucial to preventing future occurrences.
To begin with, food allergies can manifest in various ways, including skin reactions like hives, gastrointestinal issues, respiratory problems, and even anaphylaxis in severe cases. The symptoms you experienced indicate that your immune system reacted to a specific food allergen, but pinpointing the exact trigger can be challenging.
One of the most effective methods for identifying food allergies is through allergy testing. There are two primary types of tests: skin prick tests and blood tests.
1. Skin Prick Test: This involves placing small amounts of potential allergens on your skin and pricking it to allow the substances to enter just below the surface. If you are allergic to a substance, you will develop a small raised bump at the test site.
2. Blood Tests: These tests measure the level of specific IgE antibodies in your blood that are produced in response to particular allergens. This method is particularly useful for individuals who may have skin conditions that could interfere with skin testing or for those who prefer a blood test.
In your case, since you are looking to avoid future allergic reactions, a blood test might be a suitable option. It can help identify specific food allergens that you may be sensitive to, allowing you to make informed dietary choices moving forward.
Regarding your question about insurance coverage, it varies by region and insurance provider. In many cases, allergy testing may be covered under health insurance, especially if it is deemed medically necessary by your healthcare provider. It’s advisable to consult with your doctor about the specifics of your situation and to check with your insurance provider regarding coverage for allergy testing.
In addition to testing, once you identify the allergens, the primary treatment is avoidance. This means eliminating the identified allergens from your diet and being vigilant about reading food labels and asking about ingredients when dining out.
Moreover, if you have a history of severe reactions, your doctor may prescribe an epinephrine auto-injector (like an EpiPen) to carry with you at all times. This can be a lifesaving measure in case of accidental exposure to allergens.
Lastly, it’s important to note that food allergies can develop at any age, and sometimes individuals may outgrow them. Regular follow-ups with an allergist can help monitor your condition and adjust your management plan as needed.
In summary, allergy testing through blood tests or skin prick tests can help identify the specific food allergens responsible for your symptoms. It’s essential to work closely with your healthcare provider to determine the best course of action and to discuss insurance coverage for the tests. Avoidance of identified allergens is the key to managing food allergies effectively.
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