Patch Testing

Dermatologists and allergy specialists use patch testing to determine if specific substances cause skin irritation or allergic reactions. During this test, small amounts of various substances are applied to the skin and covered with patches, which are left in place for a specific amount of time.

The process allows the medical professional to observe the skin’s reaction to each substance. We can help pinpoint any ingredients that could lead to discomfort, rashes, itching, or other dermatological issues when in contact with the skin over time

Uses of Allergy Patch Test

Patch testing is particularly effective for uncovering allergens responsible for conditions such as eczema (atopic dermatitis) and contact dermatitis, where symptoms may not appear until days after exposure to the allergen.

The method of patch testing is invaluable for patients who struggle to pinpoint the exact cause of their allergic reactions due to the delayed nature of their symptoms. Common substances tested during patch testing include:

• Detergents
• Soaps
• Makeup
• Hair dyes
• Metals
• Leather
• Latex
• Various medications
• Preservatives
• Dental care products
• Certain foods

How We Conduct A Patch Test

It is important to stop taking any oral steroids for 5 days before and while undergoing a patch test. Residual amounts of these substances in your body can adversely affect the accuracy of the test results. You should also refrain from the application of topical steroids to the test area.

Your allergist will apply small quantities of potential allergens into individual chambers, which are then securely affixed to your back with adhesive tape. These substances will remain in contact with your skin for 48-72 hours.

It is essential during this time to keep the area dry and avoid excessive movement, such as bending or stretching, which could displace the patches and skew the results.

You will need to return to the allergist’s office to remove the patches after 48 hours. Any signs of irritation or redness where the allergens were applied may indicate an allergy.

Furthermore, you must come back to the office on the 5th day (after 96 hours), so your skin may be evaluated once again.

Further assessments may be necessary to confirm the allergy based on these observations. Your doctor will discuss whether additional follow-up evaluations are needed.

Why is Patch Testing Done?

Allergy patch tests help determine the triggers of allergic contact dermatitis, a skin condition characterized by inflammation and itchiness. Individuals with this condition experience inflamed skin patches that develop after direct contact with an allergen.

These patches can become intensely itchy and may lead to rashes, potentially spreading to other parts of the body. This widespread reaction makes managing the itching challenging for those affected by allergic contact dermatitis.

Patch testing helps pinpoint the specific allergens responsible, enabling effective management and prevention strategies.

Furthermore, you must come back to the office on the 5th day (after 96 hours), so your skin may be evaluated once again.

Further assessments may be necessary to confirm the allergy based on these observations. Your doctor will discuss whether additional follow-up evaluations are needed.

Let Juniper Allergy Help You

If you’d like to learn more about patch testing and how it could help you, our team is happy to answer any questions you may have. You can call (210) 888-1297 or email help@juniperallergy.com to discuss the next steps.