It is a method of testing for allergic antibodies. We will introduce small amounts of suspected allergens into the skin, noting the development of a reaction. The results are read 15- 20 minutes after the application of the allergen. Interpretation of skin tests requires the allergist’s skill in matching the results with the patient’s history of allergy-like symptoms. However, just because a particular allergen is positive does not necessarily mean that substance is causing the symptoms.