Dust Allergies

For creatures you can't even see, dust mites can stir up a lot of trouble. About 20 million Americans are allergic to these little bugs. When you're one of these people, you may feel as if you have an endless cold or even asthma.

Medication can help, and you can also take simple steps to keep the dust mites away.

Symptoms to Watch For

Dust allergy symptoms are similar to those of pollen allergies:

  • Red, itchy, watery eyes
  • Itchy, runny, stuffy nose
  • Sneezing

'The Dirt' on Dust Mites

To get rid of these tiny creatures in your home, keep in mind their living habits. They prefer temperatures of about 70 F or higher and humidity of  70% to 80%. They can't survive in colder, drier places.

In the U.S., dust mite allergies peak in July and August, when dust mite populations are high because of warm weather.

Dust mites like to eat dead skin from pets and humans. You probably shed enough skin a day to feed a million dust mites. Flakes of dead skin in carpeting, beds, and furniture are like tasty snacks for them.

What Causes Dust Allergies?

It sounds nasty, but it's true: One piece of dust can contain pet dander, pieces of dead cockroaches, and mold spores, along with dead skin and dust mites.

Both cockroaches and pet dander are common allergy triggers, too. Cockroach waste, saliva, and body parts are a problem in some homes, particularly in the southern U.S.

How Can I Prevent Symptoms?

The best strategy is to limit your exposure to dust.

Start in the bedroom, where you probably spend the most time. Large numbers of dust mites can gather in mattresses, bedding, and upholstered furniture.

Wear a mask while cleaning, too.

Bedroom Dust-Busting Tips

Put airtight, plastic dust-mite covers on pillows, mattresses, and box springs.

Use pillows filled with polyester fibers instead of kapok or feathers.

Wash bedding in very hot water (over 130 F) once a week. The water needs to be this hot to kill dust mites. Dry the bedding in a hot dryer.

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If your bedroom is in a basement with a concrete floor, move upstairs if you can. Concrete stays damp and creates the moist, humid environment dust mites love.

Around the House

Clean bare floors often with a damp mop or cloth.

Vacuum carpets once or twice a week. Use a vacuum with a HEPA (high-efficiency particulate air) filter. If your dust allergy is severe, ask your doctor if replacing wall-to-wall carpeting with hardwood or vinyl floors would help.

Wash throw rugs in hot water.

Vacuum upholstered furniture such as sofas. Wood, leather, plaster, or metal furniture is better for dust allergies.

Replace drapes with roll-up window shades. If you must have curtains, wash them in hot water each season.

Get rid of stuffed animals, soft toys, and other dust collectors.

Keep Air Clean and Dry

Use an air conditioner or dehumidifier to lower humidity.

Put a HEPA filter with a MERV rating of 11 or 12 in your heating and air-conditioning unit. You can find the rating listed on the packaging. Change the filter every 3 months.

Keep humidity in your home below 55%. Use a hygrometer to measure it. You can get one at hardware and building supply stores.

How Are Dust Allergies Treated?

Over-the-counter or prescription allergy drugs can help control your symptoms.

You might be able to get allergy shots (immunotherapy). They treat allergies over a longer time. There is also a prescription medication called Odactra that is an allergen extract that can be taken under the tongue instead of as a shot. It can help relieve nasal and eye irritation due to dust mite allergy.  Talk to your doctor about what treatment is best for you.

WebMD Medical Reference Reviewed by Melinda Ratini, DO, MS on 4/, 017

Sources

SOURCES:

American Academy of Asthma, Allergy, and Immunology: "House Dust Allergy," "Indoor Allergy Survival Tips."

Asthma and Allergy Foundation of America: "What Is Dust Mite Allergy?"

Familydoctor.org: "Allergies: Things You Can Do to Control Your Symptoms."

National Institute of Allergy and Infectious Diseases (NIAID): "How to Create a Dust-Free Bedroom."

News release, Sanofi-aventis U.S.

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