House Dust Mite Allergy

If you see an ENT doctor in Singapore with a blocked nose or sinus infection, he or she will often consider allergy as an underlying risk factor. The commonest allergy in Singapore is house dust mite allergy. About 80% of the adult population in Singapore has evidence of house dust mite allergy (IgE antibodies) but only half (roughly 40%) will develop symptoms of allergic rhinitis (swelling of the nasal lining).​
Avoiding exposure to dust mites is the best strategy for controlling dust mite allergy. While you can't completely eliminate dust mites from your home, you can significantly reduce their number.​

​This ten-point plan will help reduce dust mites in your home.

1. Use allergen-proof bed covers. Keep your mattress and pillows in dust-proof or allergen-blocking covers. These covers, made of tightly woven fabric, prevent dust mites from colonising or escaping from the mattress or pillows. Encase box springs in allergen-proof covers.
2. Wash bedding weekly. Wash all sheets, blankets, pillowcases, and bed-covers in hot water that is at least 60C 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 60C to kill the mites. Then wash and dry the bedding to remove the allergens. Freezing non-washable items for 24 hours also can kill dust mites, but this won't remove the allergens.
3. Keep humidity low. Maintain a relative humidity below 70% in your home. A dehumidifier or air conditioner can help keep humidity low, and a hygrometer (available at hardware stores) can measure humidity levels.
4. Choose bedding wisely. Avoid bed-covers that trap dust easily and are difficult to clean frequently.
5. Buy washable stuffed toys. Wash them often in hot water and dry thoroughly. Also, keep stuffed toys off beds.
6. Remove dust. Use a damp or oiled mop or rag rather than dry materials to clean up dust. This prevents dust from becoming airborne and resettling.
7. Vacuum regularly. Vacuuming carpeting and upholstered furniture removes surface dust — but vacuuming isn't effective at removing most dust mites and dust mite allergens. Use a vacuum cleaner with a double-layered micro-filter 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 in the vacuumed room.
8. Cut clutter. If it collects dust, it also collects dust mites. Remove knickknacks, tabletop ornaments, books, magazines, and newspapers from your bedroom.
9. 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, non-washable curtains, and horizontal blinds.
10. 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.