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    Allergies Health Center

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    Top Allergy Terms

    Adenoids : Glands or lymphoid tissue in the upper part of the throat behind the nose.

    Adenoidectomy: The surgical removal of adenoids. It can help prevent blocks in your airways and the Eustachian tubes in your ears. This may make you less likely to get frequent sinus and ear infections, among other problems. It’s usually an outpatient procedure under general anesthesia.

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    Allergen: A substance that triggers an allergic reaction in a person who’s sensitive to it.

    Allergic rhinitis : See Hay fever.

    Allergy: A severe response to a substance or condition. It happens when your body produces and releases histamine or histamine-like substances.

    Allergy index: A measure of people with allergies in your region who are affected by pollen. Since some types of pollen are more likely to cause allergies than others, a high allergy index doesn’t always mean there’s a high pollen count.

    Allergy shots: See Immunotherapy.

    Anaphylaxis : A severe, life-threatening allergic response that may include lowered blood pressure, swelling, and hives.

    Angioedema: Swelling that’s similar to hives, except it happens under your skin instead of on the surface. You’ll notice a deep swelling around your eyes and lips and sometimes on your hands and feet.

    Antibodies: These special proteins seek out, attach to, and zap foreign proteins, microorganisms, or toxins in your blood. They’re part of your immune system.

    Antigen: A substance, usually a protein, which your body perceives as foreign.

    Antihistamine : Medication that prevents symptoms like congestion, sneezing, and itchy, runny nose.

    Anti-inflammatory: Type of medication that eases swelling and inflammation.

    Asthma : A disease that affects the branches of your windpipe (bronchial tubes) that carry air in and out of your lungs. Your airways narrow, their linings swell and produce more mucus. All this makes it hard to breathe. You might feel like you aren’t getting enough air into your lungs.

    Bronchodilators : Medications used to relax the muscle bands that tighten around your airways during an asthma attack. They also help clear mucus from your lungs. 

    Conjunctivitis : Also called pinkeye, it’s an inflammation of the conjunctiva, the tissue that lines the inside of your eyelid.

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