Allergy Skin Test Results Chart

Interpreting allergy skin test results involves observing the skin's reaction to various allergens applied during the test. A positive result is indicated by the presence of a wheal, which is a raised, red area at the test site. The size of the wheal and the degree of redness are assessed to determine sensitivity levels, typically graded on a scale from mild to strong.

The numbers on allergy skin test results refer to the size of the wheal (raised, red area) that develops at each test site. A larger wheal generally indicates a higher level of sensitivity to that particular allergen. Skin test results are typically graded on a scale from 0 to 4+, with 0 meaning no reaction and 4+ indicating a very large wheal (15 mm or greater in diameter).

Skin allergy testing is generally considered accurate, but it is not infallible. While it can effectively identify many allergies, false positives and false negatives can occur. Overall, when performed by a qualified allergist, skin tests provide valuable information for diagnosing allergies, but results should be interpreted alongside clinical history and other diagnostic methods for the best accuracy.