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A patch test consists of specific allergens that are applied to small adhesive patches, then placed on the skin (usually the back). If a patched area of skin shows an allergic reaction, such as redness or itchiness, the patient is deemed to be allergic to that substance.

Patch test reactions usually appear quickly – often within 48 hours – though some may take several days. There are a wide variety of allergens that can be tested through patches, including cosmetics, fragrances, foods, chemicals and many more. The materials used in patch testing are hypoallergenic to help rule out conflicting results in the tested areas.

Though patch tests are an important diagnostic tool, they are not foolproof. Some patch test results may return as false-positive and some may return as false-negative. Overall, however, the patch test is a reliable determinant of allergen sources.

Get Patch Testing treatment at Howard County, MD

Call (410) 992-4100 or fill out the consult form to request your appointment today.

Interested in Patch Testing Treatment? Request a consultation with a skin specialist today.


*Age Restriction.
For patients scheduling who are under 18 years of age (19 in Alabama) please make sure you have permission from your parent or legal guardian to schedule this appointment.  Your parent or legal guardian must accompany you on your initial visit and on certain subsequent visits to provide appropriate informed consent.