Why Get an Allergy Test?
Allergy testing can help identify specific allergens—substances that trigger your immune response. From seasonal pollen to food sensitivities, a test can clarify what’s behind your symptoms and guide your treatment.
You might consider testing if you experience:
- Sneezing and congestion
- Chronic cough or asthma
- Itchy or watery eyes
- Hives or rashes
- Digestive discomfort
- Frequent sinus infections
- Reactions to unknown substances
These seven allergy symptoms are common signs your body might be reacting to allergens.
Types of Allergy Testing
Different types of tests are available depending on your symptoms, medical history, and preferences.
Skin Prick Test (SPT)
Often considered the gold standard for diagnosing allergies, the skin prick test (also known as the scratch test) involves placing small amounts of allergens on your skin and lightly pricking the surface. If you’re allergic, a raised bump—called a wheal—may appear.
You may see results recorded in a chart, like an allergy wheal size chart, which helps interpret reaction severity. Terms like wheal and flare, erythema, and wheal size meaning are used to assess results.
Patch Testing
A patch test is typically used for contact allergies (like metal or cosmetic ingredients). Adhesive patches with allergens are placed on your back for 48 hours. The allergy patch test list of allergens 80 covers common substances used in this test.
The TRUE test, a standardized patch test, includes a set of allergens applied in a structured grid known as a TRUE test patch test chart.
Blood Tests
When skin testing isn’t ideal, blood tests can be used to measure the presence of allergen-specific antibodies. This method is useful if you’re taking antihistamines or have skin conditions that make prick testing unreliable.
If you’re preparing for a test, keep in mind that some supplements to stop before allergy testing or why no caffeine before allergy test may apply. Always follow your doctor’s prep instructions.
At-Home Allergy Test Kits
Can you test for allergies at home? The answer is yes—but with caution.
There are at-home allergy test kits, including food allergy testing kits, home allergen tests, and even mail-in allergy tests. While convenient, they may not be as accurate as those done in a medical setting. Some include allergy test papers or use dried blood spots to identify common allergens.
Parents might search for the best allergy testing kit for kids, while others look for online allergy test options or over-the-counter allergy tests. These tools can offer a starting point but should be followed up with professional interpretation.
How to Prepare for an Allergy Test
Preparing correctly can affect your results. Here’s what to know:
- Ask if you need to stop antihistamines before testing.
- Avoid caffeine or certain supplements that might affect your immune response.
- Wear comfortable clothing, especially for skin patch tests or subcutaneous immunotherapy (SCIT) evaluations.
- Let your provider know about any medications or recent illnesses.
If you’re doing a home allergy test kit, make sure you follow the instructions carefully to avoid contamination or inaccurate results.
Understanding Your Results
Interpreting allergy test results can be tricky. For skin tests, your provider will measure wheal size and note if there’s flare or erythema around the site. Charts like the skin prick test allergen list or wheal flare interpretation help identify sensitivity levels.
With blood tests, lab values will indicate which allergens triggered an immune response. Some charts use codes or categories to show severity.
If you suspect environmental triggers, you can even learn how to test allergens in your home to further limit exposure.
What Happens After Testing?
Depending on your results, you might receive:
- A personalized allergy management plan
- Recommendations for environmental changes
- Referral to an asthma and allergy clinic near you
- Information about allergy shots (immunotherapy), available in specialized allergy offices near you
If you’re dealing with respiratory issues, finding an asthma allergy doctor near you can offer integrated care.
Can Blood Pressure Affect Allergy Testing?
Interestingly, some people ask about blood pressure in relation to allergies. While not directly linked, your vitals (like 112/70 blood pressure or 126 over 80) are typically monitored during allergy evaluations—especially if medications or immune responses might affect your system.
In rare cases, allergic reactions can elevate heart rate or cause drops in blood pressure, which is why your provider may look out for stroke level blood pressure readings or compare to a blood pressure stroke risk chart in specific scenarios.
Allergy testing can help bring clarity and control to your health. Whether you’re exploring options through your provider or considering an at-home kit, understanding the process is the first step. Always consult a healthcare professional for accurate diagnosis and treatment options that suit your lifestyle.
