What are allergic reactions?
A person who has allergic reactions is unusually sensitive to a harmless substance, called an allergen. The allergen causes swelling and irritation of the skin, eyes, lungs, or intestines.

What are the symptoms of an allergic reaction?
Common symptoms of allergic reactions include rashes, hives, facial swelling, eye swelling, eye redness, itching, wheezing, and diarrhea.

How does the doctor treat allergic reactions?
Treatment for allergic reactions may include epinephrine injections, antihistamines, corticosteroids, and additional medications that reduce the symptoms of allergic reactions. Allergy shots may help reduce the symptoms of allergic reactions.