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What Are Dust Mites?

Dust mites are very small, insect-like pests that feed on dead human skin cells and thrive in warm, humid settings. Dust mites are too small for us to see. They are not parasites that bite, sting, or burrow into our bodies. Instead, people who are allergic to dust or dust mites are reacting to inhaling proteins in dust that come from dust mite feces, urine, or decaying bodies. Any swelling (also called inflammation) of the nasal passages caused by dust mites is considered a dust allergy.

Dust mites can live in the bedding, mattresses, upholstered furniture, carpets, or curtains in your home. Dust mites are nearly everywhere; roughly four out of five homes in the United States have dust mite allergens in at least one bed.

Where do dust mites come from?

Dust mites occur naturally and can appear in nearly all homes. Humidity is the most important factor in determining whether a house has high levels of dust mites. This is because dust mites do not drink water as we do; they absorb moisture from the air. In areas with low humidity, like deserts, dust mites cannot survive.

Unlike pet allergens, dust mite allergens do not usually stay in the air. Instead, the allergen settles quickly into dust or fabrics. These allergens cling to bedding, mattresses, upholstered furniture, carpets, and curtains, which also serve as nests. Most exposure to dust mite allergens occurs while sleeping.

Are dust mites harmful to your health?

Dust Mites are one of the major indoor triggers for people with asthma.

Ongoing exposure to dust mites at home can impact the health of people with asthma and those who are allergic or sensitive to mites. These allergens can trigger mild to severe allergic symptoms and can be responsible for asthma attacks. A mild case may cause an occasional runny nose, watery eyes, and sneezing. In severe cases, the condition is ongoing, resulting in persistent sneezing, cough, congestion, facial pressure or even a severe asthma attack. People with asthma who are sensitive to dust mites face an increased risk of asthma attacks.

How to protect yourself from dust mites

You can take action to reduce dust mites in your home.

  • Reduce humidity. Keep your home below 50 percent humidity. In humid areas, air conditioning and dehumidifiers can help.

  • Reduce the places where dust mites can live. If you can't remove upholstered furniture or use furniture with smooth surfaces, it is recommended to have your upholstery cleaned every 30- 60 days. Remove drapes and curtains. Cover mattresses and pillows with allergen encasements. Wash bedding in hot water (at least 120 degrees F) once a week. Reduce clutter, stuffed animals, and other places where dust mites live. If that’s not possible, wash stuffed animals weekly in hot water (at least 130 degrees) to kill and wash away dust mites.

  • Replace carpets. Regularly scheduled carpet cleaning from a professional is recommended every 30-60 days. However, to eliminate the need for carpet cleaning, carpeting should be removed from the home, especially if occupants are allergic to dust mites. If you must keep the carpet, use a vacuum cleaner with a HEPA (High-Efficiency Particulate Air) filter. Damp clean floors often, focusing on catching dirt and dust without wet mopping.

  • Dust regularly. Dust regularly to reduce the amount of dust and improve overall indoor air quality in your home. When dusting, use something that can trap and lock dust (like a wet washcloth or microfiber cloth) dust to reduce the amount of it that is stirred up when cleaning.

  • Use HEPA filtration air purifiers. Although dust can never be completely eliminated from entering your air, the use of air purification products allows for maximum air filtration and air circulation. Through the use of HEP)A and other patented filter air purifiers, these products bring air in and filter the allergens and contaminants, releasing clean into your home or occupied dwelling.

  • Regularly scheduled filter replacement. Your air filters are the first line of defense against the circulation and collection of indoor airborne allergens like dust. However, one of the main reasons for poor indoor air quality and HVAC malfunction is the failure to regularly replace the air filters.

People with allergies to dust mites or with asthma triggered by dust mite allergies need to reduce dust mites in their homes.

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