ALLERGIES

WHAT IS AN ALLERGIC REACTION?

Allergies occur when your immune system reacts to a foreign substance — such as pollen, bee venom or pet dander — or a food that doesn't cause a reaction in most people.Your immune system produces substances known as antibodies. When you have allergies, your immune system makes antibodies that identify a particular allergen as harmful, even though it isn't. When you come into contact with the allergen, your immune system's reaction can inflame your skin, sinuses, airways or digestive system.

The severity of allergies varies from person to person and can range from minor irritation to anaphylaxis — a potentially life-threatening emergency. While most allergies can't be cured, treatments can help relieve your allergy symptoms.

Hay fever, also called allergic rhinitis, can cause: Sneezing; itching of the nose & eyes; runny, stuffy stuffy nose; watery, red or swollen eyes

A food allergy can cause: Tingling in the mouth; swelling of the lips, tongue, face or throat; hives; anaphylaxis

An insect sting allergy can cause: A large area of swelling (edema) at the sting site; itching or hives all over the body; cough, chest tightness, wheezing, shorness of breath; anaphylaxis

A drug allergy can cause: Hives; itchy skin; rash; facial swelling; wheezing; anaphylaxis

Atopic dermatitis, an allergic skin condition also called eczema, can cause skin to: Itch, redden, flake or peel