Question 1

Do I need to fast before an allergy test?

Accepted Answer

No. Neither a skin prick test nor a blood IgE test requires fasting. You can eat and drink normally beforehand.

Question 2

Do I have to stop antihistamines before testing?

Accepted Answer

For a skin prick test, yes, most clinics ask you to stop antihistamines about a week beforehand, since they can suppress the skin reaction and cause a false negative. A blood IgE test isn't affected by antihistamines, so there's nothing to stop.

Question 3

Can children get an allergy test?

Accepted Answer

Yes. Both tests are used in children, but a blood IgE draw is often preferred for younger kids since it needs one needle stick instead of multiple skin pricks.

Question 4

How accurate is a blood allergy test vs a skin prick test?

Accepted Answer

Neither is perfect alone. Skin prick is read the same visit and is very sensitive, but it can flag a sensitivity that never causes real symptoms. Blood IgE avoids skin interference but can also return false positives. Both are read against your history, not as a standalone diagnosis.

Question 5

Is a dust allergy test different from a general allergy panel?

Accepted Answer

No, it's the same method, skin prick or blood IgE, just narrowed to dust mite and related indoor triggers instead of a wider panel.

Question 6

How long do allergy test results take?

Accepted Answer

A skin prick test is read within 15 to 20 minutes at the clinic. A blood IgE panel needs lab processing, so results typically return within 24 to 48 hours.

Question 7

Is allergy testing the same as food intolerance testing?

Accepted Answer

No. Allergy testing looks for IgE antibodies tied to immune reactions like hives or swelling. Food intolerance testing measures a different marker, IgG, and reflects digestive sensitivity, not a true allergy.