What can I do about dust allergies?

Enviro control. You can use dustmite covers for pillows and mattresses (achoo allergy has good ones), wash sheets in really hot water once weekly, decrease humidity of the house to less than 50%. Those are the most beneficial. Wear a mask when vacuuming or dusting. Or if you have your house cleaned, allow about 2-3 hours before you come back to your house to allow for things to settle back down.