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A Comprehensive Guide to Preparing for an Allergy Test: Tips for Accurate Results

A Comprehensive Guide to Preparing for an Allergy Test: Tips for Accurate Results
A Comprehensive Guide to Preparing for an Allergy Test: Tips for Accurate Results

How to Prepare for an Allergy Test

Allergy tests are essential in determining what specific allergens may be causing you discomfort or potential health problems. Preparation for an allergy test can vary depending on the type of test being performed, but there are some general steps you can take to ensure an accurate and successful test. This article will cover everything you need to know about preparing for an allergy test.

Types of Allergy Tests

There are two main allergy tests: skin and blood tests. Skin tests involve a small amount of allergen being placed on or just under the skin to see if there is a reaction. Blood tests, also known as RAST tests, measure the level of antibodies in the blood to specific allergens.

Pre-Test Preparation

Before undergoing any allergy test, it’s essential to inform your doctor of any medications or supplements you are taking, as some can interfere with test results. It’s also essential to avoid antihistamines for several days before the test as they can suppress skin reactions and affect the accuracy of test results.

Eating a light meal before your appointment is recommended to prevent dizziness or fainting during the test. If you have a history of severe allergic reactions, make sure to inform your doctor and bring an epinephrine auto-injector with you to the appointment.

Skin Test Preparation

For skin tests, it’s crucial to keep the testing area free of any lotions, creams, or oils as they can interfere with test results. Avoid shaving or waxing the testing area for at least 24 hours before the test.

Blood Test Preparation

Blood tests do not require special preparation, but it’s recommended to fast for eight hours before the test to ensure accurate results.

During the Test

During a skin test, you may experience slight itching or redness at the testing site, but these reactions are typically mild and go away quickly. Blood tests are relatively painless, with just a tiny amount of blood being drawn from a vein in the arm.

After the Test

After the test, avoiding any activities that may cause excessive sweating or irritation to the testing area is essential, as this can affect test results. If you have any concerns or questions about the test results, discuss them with your doctor.


Preparing for an allergy test is a straightforward process that can help ensure accurate and successful results. Following the pre-test preparation guidelines, avoiding certain medications, and informing your doctor of any concerns can ensure a smooth and successful allergy test. If you have any questions or concerns, don’t hesitate to discuss them with your doctor. With the proper preparation, an allergy test can be a valuable tool in determining what allergens may affect your health and quality of life.