An allergy Overview of Allergic Reactions The immune system is your body's defense system. It helps protect you from illness and infection. The immune system usually reacts to and attacks bacteria, viruses, and cancer cells. An allergy... read more is when your body's immune system Overview of the Immune System The immune system is your body's defense system. It helps protect you from illness and infection. The immune system's job is to attack things that don’t belong in your body, including: Germs... read more reacts to something harmless, such as food, plants, or medicine. Seasonal allergies are allergies that happen only during the time of year when a certain substance you're allergic to (allergen) is in the air. Seasonal allergies are sometimes called “hay fever.” Grass, pollen, or mold are common allergens that cause seasonal allergies.
Seasonal allergies can happen in the spring, summer, or fall, depending on what you're allergic to.
Your doctor will have you treat your allergies with:
If these medicines don't help and your symptoms are severe, your doctor may recommend you get:
In desensitization, the doctor gives you shots of the substance you're allergic to. At first the shots have only a very, very tiny amount of the substance. The amount is too small to cause a severe reaction. Then the doctor gives you shots that have more and more of the substance. That way, your body can become used to the substance and not have an allergic reaction. Allergy shots don't always work. And when they do work, you may have to keep getting the shots.