patchtesteihin

Patch testing, or lappitestaus in Finnish, is a diagnostic method used to identify substances that cause allergic contact dermatitis. It involves applying small amounts of suspected allergens to the skin, typically on the back, under occlusive patches. These patches are worn for 48 hours, after which they are removed, and the skin is examined for reactions such as redness, swelling, or blistering. A second reading may occur 24-48 hours after patch removal to detect delayed reactions.

The allergens used in patch testing are standardized and include common culprits like fragrances, preservatives, metals (such as nickel), rubber compounds, and topical medications. The selection of allergens is guided by the patient's medical history and the nature of their skin reaction. It is crucial that the testing is performed by a qualified healthcare professional, usually a dermatologist, who can accurately interpret the results.

Patch testing is a cornerstone in the diagnosis and management of allergic contact dermatitis, a delayed hypersensitivity reaction. By identifying the specific trigger, patients can avoid future exposure, thereby preventing recurrent skin inflammation and improving their quality of life. The procedure is generally safe, though mild irritation at the testing sites can occur even without an allergy. It's important to inform the doctor about any medications being taken, especially topical steroids, as they might interfere with the test results.