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Allergies

Medically reviewed by Drugs.com. Last updated on Mar 3, 2024.

What are allergies?

Allergies are an immune system reaction to a substance called an allergen. Your immune system sees the allergen as harmful and attacks it.

What causes allergies?

You may have allergies at certain times of the year or all year. The following are common allergies:

What increases my risk for allergies?

Allergic reactions can happen at any time, even if you have not had allergies before. You may develop an allergy after you have been exposed to an allergen more than once. Allergies are most common in children and elderly people, but anyone can have an allergic reaction. Your risk is also increased if you have a family history of allergies or a medical condition such as asthma.

What are the signs and symptoms of allergies?

How are allergies diagnosed?

Your healthcare provider will ask about your signs and symptoms. The provider will ask which allergens you have been exposed to and if you have ever had other allergic reactions. The provider may look in your nose, ears, or throat. You may need additional testing if you developed anaphylaxis after you were exposed to a trigger and then exercised. This is called exercise-induced anaphylaxis. You may also need the following tests:

How are allergies treated?

Treatment options

The following list of medications are in some way related to or used in the treatment of this condition.

View more treatment options

What steps do I need to take for signs or symptoms of anaphylaxis?

What safety precautions do I need to take if I am at risk for anaphylaxis?

How can I manage allergies?

How can I prevent an allergic reaction?

Call 911 for signs or symptoms of anaphylaxis,

such as trouble breathing, swelling in your mouth or throat, or wheezing. You may also have itching, a rash, hives, or feel like you are going to faint.

When should I seek immediate care?

When should I contact my healthcare provider?

Care Agreement

You have the right to help plan your care. Learn about your health condition and how it may be treated. Discuss treatment options with your healthcare providers to decide what care you want to receive. You always have the right to refuse treatment. The above information is an educational aid only. It is not intended as medical advice for individual conditions or treatments. Talk to your doctor, nurse or pharmacist before following any medical regimen to see if it is safe and effective for you.

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Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.