Can patch testing be performed during the acute phase of dermatitis?

Jan 25, 2025 Source: Cainiu Health

Dr. Liu Wenmin

Introduction

During the acute phase of dermatitis, patch testing is generally not recommended because the skin is in a state of high sensitivity and may produce an inflammatory reaction. Performing patch testing at this time could exacerbate symptoms, compromise the accuracy of results, and pose safety concerns. Additionally, to ensure accuracy, medications such as corticosteroids and antiallergic agents should be discontinued before undergoing patch testing.

Generally, patch testing should not be performed during the acute stage of dermatitis. If experiencing discomfort, it is recommended to seek medical attention. Detailed explanation is as follows:

During the acute phase of dermatitis, patients may exhibit symptoms such as redness, swelling, papules, and vesicles on the skin, and there may even be exudate from inflammation. At this time, the skin is in a highly sensitive state. Performing a patch test may further irritate the skin during the application process, thereby worsening symptoms and negatively affecting treatment. Additionally, it could interfere with the accuracy of the test results and even pose potential safety risks. Therefore, patch testing should not be conducted during the acute phase of dermatitis.

Besides, before undergoing patch testing, patients should stop using corticosteroids, antiallergic medications, and other relevant drugs in a timely manner to ensure accurate test results. During the testing process, regular monitoring is necessary, and if any discomfort occurs, the test should be discontinued promptly.

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