Dust mite allergy is an allergic reaction to tiny bugs that commonly live in house dust. Signs of dust mite allergy include those common to hay fever, such as sneezing and runny nose. Many people with dust mite allergy also experience signs of asthma, such as wheezing and difficulty breathing. Dust mites, close relatives of ticks and spiders, are too small to see without a microscope. Dust mites eat skin cells shed by people, and they thrive in warm, humid environments. In most homes, such items as bedding, upholstered furniture, and carpeting provide an ideal environment for dust mites.
By taking steps to reduce the number of dust mites in your home, you may get control of dust mite allergy. Some of the ways you can reduce the risk of triggering your dust mite allergy are:
Use allergen-proof bed covers. Keep your mattress and pillows in dustproof or allergen-blocking covers. These covers, made of tightly-woven fabric, prevent dust mites from colonizing or escaping from the mattress or pillows. Encase box springs in allergen-proof covers.
Wash bedding weekly. Wash all sheets, blankets, pillowcases, and bedcovers in hot water that is at least 130 F (54.4 C) to kill dust mites and remove allergens. If bedding can’t be washed hot, put the items in the dryer for at least 15 minutes at a temperature above 130 F (54.4 C) to kill the mites. Then wash and dry the bedding to remove allergens. Freezing nonwashable items for 24 hours also can kill dust mites, but this won’t remove the allergens.
Keep humidity low.
Maintain a relative humidity below 50 percent in your home. A dehumidifier or air conditioner can help keep humidity low, and a hygrometer (available at hardware stores) can measure humidity levels.
Choose to bed wisely. Avoid bedcovers that trap dust easily and are difficult to clean frequently.
Buy washable stuffed toys. Wash them often in hot water and dry thoroughly. Also, keep stuffed toys off beds.
Remove dust. Use a damp or oiled mop or rag rather than dry materials to clean up the dust. This prevents dust from becoming airborne and resettling.
Vacuum regularly. Vacuuming carpeting and upholstered furniture remove surface dust — but vacuuming isn’t effective at removing most dust mites and dust mite allergens. Use a vacuum cleaner with a double-layered microfilter bag or a high-efficiency particulate air (HEPA) filter to help decrease house-dust emissions from the cleaner. If your allergies are severe, stay out of the area being vacuumed while someone else does the work. Wait about two hours before going back into the vacuumed room.
Cut clutter. If it collects dust, it also collects dust mites. Remove knickknacks, tabletop ornaments, books, magazines, and newspapers from your bedroom.
Remove carpeting and other dust mite habitats. Carpeting provides a comfortable habitat for dust mites. This is especially true if carpeting is over concrete, which holds moisture easily and provides a humid environment for mites. If possible, replace wall-to-wall bedroom carpeting with tile, wood, linoleum, or vinyl flooring. Consider replacing other dust-collecting furnishings in bedrooms, such as upholstered furniture, nonwashable curtains, and horizontal blinds.
Install a high-efficiency media filter in your furnace and air conditioning unit. Look for a filter with a Minimum Efficiency Reporting Value (MERV) of 11 or 12 and leave the fan on to create a whole-house air filter. Be sure to change the filter every three months.
Dust Mite Allergy Symptoms
Dust mite allergy symptoms caused by inflammation of nasal passages include:
- Runny nose
- Itchy, red, or watery eyes
- Nasal congestion
- Itchy nose, the roof of the mouth, or throat
- Postnasal drip
- Facial pressure and pain
- Swollen, blue-colored skin under your eyes
- In a child, frequent upward rubbing of the nose