- ALLERGEN PATCH TESTING: Patch testing is a test for a skin reaction or rash which is also called a hypersensitivity reaction. Patch testing can be done for a number of different substances including metals, fragrances, preservatives and other chemicals.
This reaction is a delayed-type hypersensitivity reaction which will occur on the skin due to contact with the allergen. Patch testing is a reliable and easy test designed to assist in identifying substances found in commonly used products such as makeup, aftershave, shampoo, jewelry, medications, medical appliances, clothing, cleaning supplies, paper/ink, disinfectants, and construction materials. Our standard patch test can identify up to 33 different materials as possible allergens. Some examples of specific allergens that may be identified include Nickel, fragrance, thimersol, formaldehyde, thiuram, and paraben. The test is applied to the skin in the form of a sticker or patch (usually on a patient’s back) and is then read at 48 hrs and at 96 hours to check for reactions. Once an allergen is identified, avoidance of this agent is curative.