Allergy Skin Test Test
An allergy skin test checks if you are allergic to certain substances by exposing your skin to allergens and looking for a reaction.
What this test measures
An allergy skin test measures your immune system's reaction to specific allergens, such as pollen, dust mites, molds, pet dander, food, insect bites, medicines, or household chemicals. It usually checks for Type 1 hypersensitivity, which causes common allergies.
What your results mean
Reference ranges vary by laboratory and by your age and sex. MedlinePlus does not publish a single normal range for this test — always read your result against the range printed on your own lab report and discuss it with your provider.
Higher-than-normal results
A positive result means you are probably allergic to those substances. The larger the reaction, the more likely you are allergic.
Lower-than-normal results
A negative result means you are probably not allergic to those substances.
Frequently asked questions
What is an allergy skin test?
An allergy skin test helps find out what is causing your allergic reaction by exposing your skin to allergy-causing substances called allergens.
How is the test done?
During the test, your health care provider will expose your skin to a suspected allergen to see if you have an allergic reaction.
What do the results mean?
If you have red bumps or swelling, the test is positive and you are probably allergic. If no bumps or swelling, the test is negative and you are probably not allergic.
What happens if I am diagnosed with an allergy?
Your provider will recommend a treatment plan, which may include avoiding the allergen, medicines, or lifestyle changes.
What should I do if I am at risk for anaphylactic shock?
You may need to carry an emergency epinephrine auto-injector at all times and call 911 if you have symptoms.
Related lab tests
Sources
- MedlinePlus: Allergy Skin Test — NIH MedlinePlus
Last updated . Information is aggregated from official public sources and is not a substitute for professional medical care.