As I mentioned, each woman should discuss this with her physician. We believe our house is infested with dust mites, even though we have had several extensive treatments by exterminators. My wife is particularly bothered by mites. These tiny creatures are as ubiquitous as the air we breathe. Actually, it's not the mites themselves that cause coughing and congestion, it's their excrement.
Mites are virtually impossible to eradicate.
They happily survive and reproduce in dust, furniture, rugs and so forth. Therefore, most of us have to develop methods of living with them, rather than without them. Of course, this means we have to keep our homes as clean as possible, without becoming over-concerned to the point of obsession. For those individuals who truly have uncontrollable dust-mite allergies, a visit to an allergist may be helpful. Desensitization injections may be necessary, in conjunction with the judicious use of antihistamine medication.