7 doctors weighed in:

What's involved in an allergy test?

7 doctors weighed in
Dr. Eli Silver
Pediatrics
3 doctors agree

In brief: Blood and skin test

Skin test could be done by a plastic applicators or with needles.
A drop of an allergen extract is pricked into the skin and, within 15-18 min., a localized hive will emerge if you are allergic to the extract in question. The reaction will subside in 40-60 minutes. The blood test is drawn at a regular lab and takes a few days to come back. Skin test is somewhat more sensitive.

In brief: Blood and skin test

Skin test could be done by a plastic applicators or with needles.
A drop of an allergen extract is pricked into the skin and, within 15-18 min., a localized hive will emerge if you are allergic to the extract in question. The reaction will subside in 40-60 minutes. The blood test is drawn at a regular lab and takes a few days to come back. Skin test is somewhat more sensitive.
Dr. Eli Silver
Dr. Eli Silver
Thank
Dr. Robert Kwok
Pediatrics
2 doctors agree

In brief: Blood & skin testing

There are blood tests and skin tests for allergies.
Blood tests are done by a regular lab. Antibodies to suspected allergens (things that cause allergies) are identified in the serum (the watery part of the blood). Skin testing is done at an allergist's office. The doctor pricks the skin with many needles, each dipped in an allergen, and watches for reactions, which look like tiny mosquito bites.

In brief: Blood & skin testing

There are blood tests and skin tests for allergies.
Blood tests are done by a regular lab. Antibodies to suspected allergens (things that cause allergies) are identified in the serum (the watery part of the blood). Skin testing is done at an allergist's office. The doctor pricks the skin with many needles, each dipped in an allergen, and watches for reactions, which look like tiny mosquito bites.
Dr. Robert Kwok
Dr. Robert Kwok
Thank
Read more answers from doctors