Skin testing is used to confirm suspected allergens. Prick or scratch testing is done with extracts (liquid forms of the allergens) and a device to puncture the very top surface of the skin.
Intradermal testing may be done when the prick skin test is negative. It is a more sensitive test which involves putting the extract under the skin with a needle.
Reviewed by: Paulette Taylor, RN, CPN, A-EC
Date: February 2009