Allergy testing in Crystal Lake helps accurately diagnose allergies

Posted By: | Published On: | Patch Testing
Allergy testing in Crystal Lake helps accurately diagnose allergies

When patients in the Crystal Lake area come to Advanced Allergy and Asthma Associates with potential skin allergies, we may suggest patch testing. It is especially helpful in identifying allergic contact dermatitis (skin rashes) as it’s the only way to tell if a specific substance is causing your reaction.

How it works:

Patch testing reproduces the allergic reaction on the skin. Prior to testing, we will review many of the substances that you are exposed to daily. This allows us to determine which substances to test. Patches will be placed on the upper back, each containing trace amounts of the allergen. They are removed after 48 hours for an initial visual observation. They will then be left on for another 24-72 hours before final evaluation.

During the test:

While the patches are on, it’s important to keep the back from getting wet and limit sweating so that they stay on properly. Once the patches are off it’s important to continue keeping the back dry so we can have an accurate reading.

What happens next when patch testing is positive?

If we observe any reactions to a substance, that means you have tested positive. Reactions can include itching, blisters, and redness. If we discover you are allergic to a substance, we will provide information on the allergen and discuss treatment options. One of the best methods for reducing allergic reactions is avoidance.

Patch testing is extremely effective in testing well-known triggers such as fragrances in perfumes and additives in makeup and skincare products. Patch testing is not effective at testing for food allergies, pollens, molds, trees or pet dander, and hives.

Through patch testing, we can test some of the most common allergens that you are likely to encounter in daily life. If you are in Crystal Lake, call (847) 888-8802 today.

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Advanced Allergy & Asthma Associates

Meredith Cirrincione | Dr. Noga Askenazi

Amy Schack, a distinguished board-certified Physician Associate, brings a wealth of expertise to patient care. Specializing in allergic rhinitis, sinusitis, asthma, and rashes, Amy is renowned for her commitment to excellence and compassionate approach. With a background in immediate care and orthopedics, she holds a Master's in Physician Assistant studies from Midwestern University and a Bachelor of Science from Northern Illinois University. A member of esteemed professional associations, including the American Academy of Physician Assistants and the Association of PAs in Allergy, Asthma, and Immunology, Amy Schack instills confidence, ensuring you can trust her unwavering dedication to your health and well-being.


Meredith Cirrincione is a board certified Physician Assistant and specializes in treating allergies, with a focus on asthma, rashes, environmental allergies, chemical and food allergies. She holds a Masters in Physician Assistant Studies from The Chicago Medical School - Rosalind Franklin University of Health Sciences. She is a Fellow member of the American Academy of Physician Assistants, the Illinois Academy of Physician Assistants, and the Association of PAs in Allergy, Asthma and Immunology. She likes to approach things holistically. She is a strong patient advocate and adored by her patients. She enjoys singing, reading, cooking, and the great outdoors.


Dr. Noga Askenazi is a nationally recognized asthma and allergy specialist who is board certified in pediatric and adult allergy. Her areas of special interest are innovative treatment of rashes, sinusitis, food allergies, asthma and immune disorders. She was past President of the ISAAI (Illinois Society of Allergy, Asthma, & Immunology), works on state and national committees for advancement of the allergy field and is a consultant for Advocate, Ascension Health, Northwestern amongst other health care systems. Her joy is helping patients reach their goals after together determining best treatments. Her staff and patients are a chosen family, and she invests in their happiness. She enjoys gardening, biking and cooking to good music.


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