Children's Hospital Colorado
Allergy and Immunology

Allergic Reactions

Kids aren’t just mini adults. In fact, they’re incredibly different. That’s why they need incredibly different care.

U.S. News & World Report ranked in all 10 specialties badge

Get Care

Would you like to learn more about us?
checked box icon Allergy and Immunology Center
Are you ready to schedule an appointment?
calendar icon Schedule an appointment
Do you have questions about your child’s condition?
Call

What is an allergic reaction?

Allergic reactions occur when the body's immune system responds to a harmless substance as if it were a toxin or a foreign invader. This overactive response can be caused by one of several different types of immune mechanisms and can involve virtually any organ or multiple organs in the body.

The parts of the body that are commonly involved in allergic reactions include the nasal passages, the eyes, the skin and the gastrointestinal tract. Anaphylaxis is the term used to refer to an allergic reaction that is life threatening and involves multiple organ systems.

What causes allergic reactions?

The timing of allergic reactions varies depending upon the immune mechanism involved in causing the reaction. Some allergic reactions occur immediately after a sensitized person is exposed to the allergen, whereas other allergic reactions take hours to days to develop. Skin testing or blood work may help to determine the cause of reaction when symptoms occur soon after exposure to the allergen, but are not always helpful when the allergic reaction occurs hours to days after exposure.

Next steps

  • Would you like to learn more about us?

    Learn more about the Allergy and Immunology Center
  • Do you have questions about your child’s condition?

    720-777-2575
  • Are you ready to schedule an appointment?

    Schedule an appointment

Compassionate care, wherever you are

We’re here when you need us. Telehealth appointments are available across every specialty, so you can get the high-quality care we’ve always offered from the comfort, privacy and convenience of home.

See if telehealth is right for you

 

Get to know our pediatric experts.

Fred (Dan) Atkins, MD

Fred (Dan) Atkins, MD

Allergy & Immunology, Pediatrics

Allison Hicks, MD

Allison Hicks, MD

Allergy & Immunology, Pediatrics

Rupal Deitz, CPNP-PC

Rupal Deitz, CPNP-PC

Certified Pediatric Nurse Practitioner

Pia Hauk, MD

Pia Hauk, MD

Allergy & Immunology