Allergies
Causes
An allergy is an abnormal reaction by a person's immune system against a normally harmless substance, such as pollen, pet dander, or dust mites. When a person who is allergic encounters these triggers, the body reacts by releasing chemicals which cause allergy symptoms. The severity of allergies varies from person to person and can range from minor irritation to anaphylaxis - a potentially life-threatening emergency. While allergies can't be cured, a number of treatments can help relieve your symptoms.
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Symptoms
Researchers think people may inherit the tendency to be allergic. Children are more likely to develop allergies if a parent has allergies, though they may not be allergic to the same substances. People who have allergies are frequently sensitive to more than one substance. General allergy symptoms include:
- Sneezing
- Itchy eyes, nose or throat
- Congestion
- Coughing
- Wheezing
- Hives
- Red, itchy skin
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Treatment
Allergy treatment varies with the severity and type of allergy symptom. In general, avoiding the substances you’re allergic to is the first and simplest form of treatment. When avoiding allergens isn’t enough to control your symptoms, your doctor may suggest medications such as antihistamines and decongestants. Immunotherapy, or "allergy shots", is occasionally recommended if the allergen cannot be avoided.
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More Health Information
Health Library | Learn more about allergies
Health Library | Learn about allergic reactions
Health Library | Learn about food allergies
Health Library | Allergy test overview
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