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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
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    • David J. Knysak, MD
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allergist DuPage County IL

Food Allergy Testing and Personalized Nutrition Plans: Customizing Diets for Health

March 1, 2024

Blood sample for food allergy testing

Many people need personalized nutrition plans to maintain good health. With the rise in food allergies across the United States– about 30 million people have them–it is vital to get food allergy testing and to customize your diet to avoid allergic reactions. Read here about how our board-certified Read More

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The Insider’s Guide to Allergic Reaction Treatments

September 22, 2023

Allergy Doctor treating a skin condition

Allergic reactions, an overzealous response by the body's immune system to various substances, have become a prevalent concern in modern society. This article aims to provide valuable insights into understanding and managing allergic reactions. We will delve into the various treatment options Read More

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The Top Causes of Allergic Reaction in Adults

September 15, 2023

Allergist Consulting a Patient

An allergic reaction is the body's way of responding to what it considers an invader. The immune system produces antibodies when it senses a foreign substance or an allergen. These antibodies, in turn, cause cells in the body to release certain chemicals that lead to allergy symptoms. In adults, Read More

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How Can an Allergy Doctor Help You?

September 8, 2023

Allergist assists young asthmatic patient

As springtime blossoms and summer approaches, many people find themselves sneezing, coughing, and dealing with itchy eyes. Some might brush off these symptoms as a seasonal cold. However, they could be the signs of a more persistent problem: allergies. An allergy doctor, also known as an Read More

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When Should You See an Allergist?

April 21, 2023

Allergist checking patients skin

Living with allergies can be difficult, but getting the right care and help to manage them doesn’t have to be. Whether you are suffering from common seasonal allergies or a more severe reaction, visiting an allergist can make a world of difference in your overall quality of life. An allergist is Read More

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An Allergy Specialist’s Tips On Getting Through The Winter Allergy Season

November 30, 2022

Allergist doing skin prick test on child

Winter allergy season is in full swing, and for many people, that means they will soon start feeling the effects of allergies and experiencing discomfort. If you're one of the millions of Americans who suffer from winter allergies, you know they can be a real nuisance. If you don’t want it to take Read More

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Summer Allergies? 5 Ways to Help

September 9, 2022

Woman Outdoors is Having Allergy

When summer comes along, most people look forward to pleasant weather. If you’re an allergy sufferer, the upcoming summer means preparing for the season and trying as best as you can to reduce the frequency of allergy attacks. Summer may be coming to an end in Illinois, but time seems to stretch if Read More

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How to Deal with an Asthma Flare-Up

August 13, 2021

Little girl with inhaler

According to the CDC, more than 25 million Americans have asthma, a chronic condition affecting the lungs. During an asthma attack, the airways get inflamed and its surrounding muscles contract, making it difficult to breathe. If left unaddressed, a severe asthma flare-up can be 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.