Dust Mite Allergy

A dust mite allergy is an allergic reaction to dust mites. Dust mites are tiny, eight-legged relatives of spiders. They’re too small to see with your eyes. An allergic reaction is your body’s response to an allergen.

Dust mites live on bedding, mattresses, carpets, curtains and upholstered (fabric). They feed on the dead skin cells that you and your pets shed.

Dust mites have proteins in their feces (poop) and dead bodies. Usually, these substances — called allergens — are harmless. However, your immune system views them as harmful “invaders,” like bacteria or viruses, and responds to get them out of your body.

Who does a dust mite allergy affect?

Anyone can have a dust mite allergy.

You’re more likely to develop a dust mite allergy if you have asthma, eczema, hay fever (allergic rhinitis) or a biological family history of atopy. Atopy is a genetic (inherited) likelihood to develop allergies.

How common is a dust mite allergy?

Dust mite allergies are common. Approximately 20 million people in the United States have a dust mite allergy.

How does a dust mite allergy affect my body?

If you have a dust mite allergy, the first time you encounter dust mite proteins, your body responds by creating immunoglobulin E (IgE). IgE is antibodies that your immune system makes to “attack” allergens, even though these allergens might not be harmful. Once you encounter dust mite proteins again, your immune system has a greater response. This response causes allergy symptoms.