Dust mites, semi-microscopic cousins of spiders, may be found in bedding, carpeting, upholstery and drapery. These tiny creatures reside in dust, where they feed on flakes of human skin.

The bugs’ droppings cause trouble for some people, most frequently in the form of an allergic reaction to proteins found in the waste. In certain individuals, however, these proteins may trigger a severe asthma attack.

Dust mites thrive in warm, humid conditions, so consider taking steps to reduce indoor humidity.