#1 Patch Testing in NYC
Patch Testing
- Non-invasive and needle-free
- Covered by insurance
- Identifies contact & skin-related allergies
What to expect with Patch Testing
Initial consultation
Patches applied to the skin
Follow-up readings & diagnosis
What is Patch Testing?
Patch testing is an allergy test used to identify specific substances that may be causing an allergic reaction on the skin. It is commonly performed to determine the cause of allergic contact dermatitis, which is a type of delayed hypersensitivity reaction.
During patch testing, a series of small patches or panels containing different substances or allergens are applied to the patient’s back. These substances can include chemicals, fragrances, metals, preservatives, and other common allergens. The patches are usually held in place with hypoallergenic tape and left on the skin for a specific period, typically 48 to 72 hours.
Advantages of Patch Testing
Accurate Diagnosis of Skin Allergies
Personalized Treatment Plans
Because patch testing pinpoints exact triggers, your allergist can create a customized treatment and avoidance plan tailored to your results. In many cases, this plan can be discussed the same day your test readings are completed.
Improves Workplace & Occupational Safety
Patch testing is especially valuable for individuals exposed to allergens on the job. By identifying workplace-related triggers, employers and employees can take preventive measures—such as using protective equipment or substituting hazardous materials—to reduce exposure and prevent future flare-ups.
How to Prepare For Your Patch Test
To prepare for patch testing, inform your allergist about all medications you are currently taking, including prescription drugs, over-the-counter medications, herbal supplements, and vitamins. Some medications can interfere with patch testing and may need to be temporarily avoided or adjusted prior to the test.
You should also avoid sun exposure during the week leading up to the patch testing. Sunburn or tanned skin can affect the test results and make it difficult to interpret the reactions. Plus, remember to wear loose-fitting clothing that won’t rub against the test area and potentially dislodge the patches.
Patch Testing Frequently Asked Questions
How Long Does Patch Testing Take?
The patches are usually left on the skin for 48 to 72 hours. However, the exact duration may vary depending on the specific substances being tested and your allergist’s preference.
Can Patch Testing Be Performed On Infants and Young Children?
Yes, patch testing can be performed on infants and young children.
Does Patch Testing Always Produce Accurate Results?
Patch testing is considered a valuable and accurate tool for identifying specific substances that can trigger allergic contact dermatitis in individuals. However, like any medical test, patch testing may not always produce definitive or completely accurate results.
Will Taking Medications Affect Patch Testing?
Generally no, you can take antihistimines but consult your doctor firts.
Can Patch Testing Diagnose Food Allergies?
No, patch testing is primarily used for diagnosing allergic contact dermatitis caused by substances that come into contact with the skin. It is not designed to diagnose food allergies or immediate allergic reactions. Other tests, such as skin prick tests or blood tests, are typically used for diagnosing food allergies.
Can Patch Testing Be Done If I Have Eczema or Active Skin Rashes?
In general, patch testing should not be performed on active skin rashes or areas of significant eczema because it can lead to inaccurate results. If you do have eczema or skin rashes, consult your allergist first.