Besides asthma, rhinitis, and other respiratory ailments, house dust mites can be the cause of other serious health problems such as eczema, rashes, itchy skin or eyes, "glue ear" (a condition which often causes hearing loss), bronchitis, and chronic dermatitis.

The house dust mite excrement is one of the most widespread allergen triggers for asthma, eczema and allergic nasal mucous membrane inflammations. This trigger was a microscopic protein found in the excrement of the mite. Those tiny creatures thrive in their millions in the warmth and humidity of carpets, mattresses, bedding, upholstery and furnishings of even the most scrupulously clean homes. They are too small to be seen without a microscope, feeding mainly on shedded human skin scales, fungi and bacteria