A dust allergy that has lasted several years is usually allergic rhinitis, where your immune system overreacts to dust mites in bedding, carpets and old books. It tends to flare up with exposure and settle once you cut down the trigger and calm the inflammation.
Next Steps
Use dust-mite-proof covers on your pillow and mattress, and wash bedding in hot water every week. Wear a mask while cleaning or around old furniture and books. An antihistamine can ease the symptoms, so ask your physician or an ENT specialist which one suits you, and whether an allergy test would help confirm your exact triggers.
Health Tips
See a doctor sooner if wheezing, breathlessness or ear blockage joins the allergy.