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The basics of allergy testing from your Barrington Allergist

Substances that cause an allergic reaction are referred to as allergen. For people who are currently experiencing these reactions, it is important to determine what substances are triggering the events. In order to do this, allergists can test your skin or blood using small amounts of the most commonly known allergens.

Allergy tests are extremely important because they can provide insight on what you are allergic to and allow your allergist to recommend the best treatments available.

Both adults and children who suspect that they may have an allergic disease should undergo allergy testing. Inhaled allergens typically produce respiratory symptoms and food allergies mostly produce skin or gastrointestinal symptoms.

Common symptoms from allergies may include:

  • Itchy eyes, nose, or throat
  • Runny nose
  • Chest congestion
  • Hives
  • Atopic Dermatitis (Eczema)
  • Abdominal cramping or diarrhea
  • Anaphylaxis

Allergy testing is an essential step to dramatically improving the quality of life for patients who suffer from allergy symptoms. Days can be enjoyed without constant sneezing or congestion. Skin conditions can improve and you can even perform physical activities like exercising with more ease.

How do allergy tests work?

Allergy tests work by trying to identify what proteins you are reacting to within a substance. They use a tiny amount of the allergen (an allergen extract) to safely test you for allergies to the most common substances.

Types of allergy tests include:

  • Prick Test – Exposes you to a small amount of the allergen through a tiny skin prick. If you are allergic to a particular substance the skin will react in the area where it was exposed to that one specific allergen. Results are quick and accurate.
  • Patch test – Exposes the skin surface to the allergen that is covered with a special bandage. Results typically take a few days.
  • Blood Test – Although not as common as the first two, blood tests are often used when skin tests can’t be performed or if the skin tests require further clarification.
  • Oral Challenge – In some instances, patients may be tested for allergic reactions by ingesting small amounts of the potential allergens while being closely supervised by medical staff.

Allergy testing can help save patients from potentially life threatening conditions like anaphylaxis. Once the cause of your allergic reaction is determined, a course of treatment can be recommended. Many allergies can be controlled and treated with immunotherapy. With food allergies, the most common form of treatment is avoidance of the food.

If you are near Barrington, and would like to learn more about allergy testing or to schedule a consultation with our allergists, call our office today.

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Dr. Noga Askenazi, Advanced Allergy & Asthma Associates

Advanced Allergy & Asthma Associates

Dr. Noga Askenazi | Dr. Eugenia Hahn | Meredith Cirrincione

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, AMITA, 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.


Dr. Eugenia Hahn is a highly recognized board certified allergist and immunologist who treats patients of all ages. Her areas of special interest are food allergy, eczema, and asthma. She is president of the Illinois Society of Allergy & Asthma, a National Committee leader of the American Academy of Allergy, Asthma, and Immunology, a member of the American College of Allergy, Asthma, and Immunology working on new treatment options for patients. She is a consultant for Advocate, Northwestern, AMITA, Northwest Community healthcare systems amongst many others. Her patients mean everything to her as she takes pride in finding the why behind the problem. She enjoys reading and spending time with her family.


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.