Patch Testing

Patch Testing services offered in Sandy and West Jordan, UT

A patch test is essential if you have an unexplained rash that needs further investigation. The allergy, asthma, and immunology specialists at Allergy Associates of Utah in Sandy and West Jordan, Utah, use patch testing to identify allergens that may be triggering your skin reactions. With this information, they create a personalized treatment plan to help you manage your symptoms and avoid future flare-ups. Call or schedule an appointment online today to learn more.

What is patch testing?

Patch testing helps detect allergic reactions that primarily affect your skin. If you have a skin rash that looks like contact dermatitis, your allergy specialist at Allergy Associates of Utah may perform patch testing to determine what’s causing it. Patch testing looks for several external allergens (substances that cause allergic reactions), such as:

Latex
Dyes
Fragrances
Preservatives
Metals (like nickel or cobalt)
Medications
Formaldehyde
Rubber chemicals
Lanolin (found in skincare products)
Adhesives
Household cleaning agents
Certain plants and resins

More than 15,000 substances can cause skin reactions. Patch testing helps narrow down that number to help figure out why you’re experiencing a reaction.

Why might I need patch testing?

If you develop a red, itchy, bumpy rash seemingly out of nowhere, patch testing can help uncover the cause. Many everyday substances — like skincare products, detergents, or metals in jewelry — can trigger allergic reactions.

Since these reactions often take hours or even days to appear, it can be hard to pinpoint the culprit on your own. Patch testing identifies specific allergens responsible for your symptoms, allowing you to avoid triggers and find effective treatments.

What happens during patch testing?

During patch testing, your specialist places numerous patches containing common allergens on your skin. These patches stay on your skin for about 48 hours. Once they get removed, your specialist can see if your skin experiences a reaction, like redness, swelling, or a visible rash.

Your specialist marks the areas before you go home. You return in a few days, as some reactions take longer to develop.

How can I prepare for patch testing?

Your allergy specialist may ask you to stop using antihistamines, corticosteroids, or other medications that could interfere with your skin’s reaction. Avoid applying lotions, creams, or oils to your back, where your specialist places the test patches.

You should also wear loose, comfortable clothing since the patches should remain in place for several days. During this time, keep the area dry — no swimming or excessive sweating from exercise. Your provider gives you specific instructions to make sure your test is useful.

To get accurate patch testing, contact the experts at Allergy Associates of Utah by calling or scheduling an appointment online to learn more.