http://www.facingallergies.com/house-dust-mite-allergy-and-you/focus-on-house-dust-mites/
House dust mites are everywhere you are.
They breed in the places you are used to go.
The conditions you like are the ones they like.
There are millions around you each time of the day !
But fortunately you can use solutions so they don't spoil your lives.
Consult an allergy specialist to know how to deal with house dust mites and enjoy life to its fullest