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In observance of the holidays, all offices will be closed from December 24th through December 26th. We'll resume regular operations on December 27th, and close again for New Year's Eve and New Year's Day.  Wishing you a happy and healthy holiday season! 

Oak Brook Allergists
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    • Downers Grove: (630) 789-0575
    • Elmhurst: (630) 574-0460
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    • Plainfield: (815) 609-8286
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    • David J. Knysak, MD
    • Raymond M. Pongonis Jr., MD
    • Zachary E. Rubin, MD
    • Jennifer Catalfio, PA-C
    • Tammy Laas, APRN-CNP
  • Conditions & Treatments
    • Allergic Rhinitis (Hay Fever)
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Gladys Castillano

How to Choose the Right Allergy Doctor for You

August 11, 2023

Sensitive Skin, Food allergy symptoms, Irritation. Doctor dermatolog and patient

Allergies symptoms, such as sneezing, runny nose, itching, and congestion can make your routine activities challenging. While allergies, whether common seasonal allergies or severe reactions, cannot be cured, they can be managed. If you have allergies or allergy-induced asthma that is holding you Read More

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The Benefits of Seeing an Allergy Specialist: A Comprehensive Guide

August 4, 2023

doctor physician and nurse practitioner giving nasal spray to female patient in hospital consultation healthcare industry

An allergist is a medical doctor specially trained to diagnose, treat, and manage different types of allergies, asthma, and other related disorders. Whether you have food allergies, allergic rhinitis, allergy-induced asthma, or eczema, you can get outstanding care from an allergy Read More

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Why Should I See an Allergist for Difficulty Breathing

March 24, 2023

Asian woman having panic disorder in bed hand holding her chest

Having trouble inhaling or exhaling and feeling as though you can’t take in enough air can be scary. Difficulty breathing can result from a wide range of problems, including common colds, sinusitis, allergies, and asthma. If your breathing issue, wheezing, and other problems, particularly those Read More

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When to See an Asthma Doctor?

March 17, 2023

The doctor is analyzing and clarifying images of the patient's lung X-rays.

Asthma is a chronic symptom of the lungs in which your airways constrict, limiting the free flow of oxygen and causing difficulty breathing. Sometimes, an asthma attack is triggered by an environmental trigger, while other times, there may be no explanation. Asthma, even if well-controlled, can Read More

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Food Allergy Testing Prep Tips

March 10, 2023

Blood sample tube for food Intolerance test at medical laboratory

If you are among 30 million Americans who suffer from food allergies, you know that vomiting, diarrhea, tingling or itching in the mouth, and swelling of lips, face, or tongue can be frightening and overwhelming. For some people, an allergic reaction to a particular food can be uncomfortable, but Read More

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Herbs to Try for Asthma Treatment

March 3, 2023

traditional Chinese herbs for asthma treatment

The prevalence of asthma in the United States is on the rise. According to the American College of Allergy, Asthma, & Immunology (ACAAI), about 8.3% of Americans suffer from Asthma, of which 76% are adults, and 24% are children. Asthma is a chronic condition of the lungs that leads to Read More

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What Is Skin Allergy?

January 27, 2023

Arm covered in a skin allergy, hives

Allergies are the body’s overactive immune response to ordinary substances such as pollen, mold, pet dander, foods, fragrances, and indoor or outdoor pollutants. Skin allergic reactions impact children and adults, and both groups benefit from identifying allergens and customized treatment. Let’s Read More

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Symptoms of Allergic Reactions And How to Deal With Them

January 20, 2023

asian beauty woman has dry skin and scratching her back

Allergic reactions can vary widely from person to person and even over a person’s own life. However, there are commonalities among allergic reactions. Here’s more on allergy symptoms and how to deal with them. The Sources of Allergic Reactions People with allergies have overactive immune systems. Read More

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Common Causes of Insect Allergies

January 6, 2023

Wasp species polished on nest. Wasp nest with wasps and larvae.

Insect allergies are reactions to insect bites or stings. They can range from a mild reaction, such as localized redness and itching, to a life-threatening one, such as anaphylactic shock. There are many insects that can cause an allergic reaction. The most common ones are bees, wasps, hornets, Read More

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Top 5 Treatments for Eczema

December 30, 2022

cotton swab with ointment spread on a wrist with eczema

Eczema is a long-term condition that causes red, inflamed skin. It is also called atopic dermatitis or atopic eczema. If you have this condition, your skin may be itchy and sometimes scaly. You might also notice small bumps that break open. The key to managing eczema is to know what to expect Read More

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At Oak Brook Allergists, our asthma and allergy specialists offer comprehensive care for Allergic Rhinitis (Hay Fever), Asthma, Chronic Sinusitis, Eczema & Hives, Food Allergies, Pet Allergies, and Stinging Insect Allergies.