An allergy 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. The substance that causes the allergic reaction is called an allergen.
Year-round allergies are:
These allergies can happen at any time of year or all year long. They don't happen just in one season, like seasonal allergies Seasonal Allergy An allergy is when your body's immune system reacts to something harmless, such as food, plants, or medicine. Seasonal allergies are allergies that happen only during the time of year when a... read more .
If you're allergic to house dust, remove or frequently clean items that collect dust, such as:
Clean your home thoroughly:
Use items that help prevent dust from building up in your home, such as:
If you're allergic to animal dander: