The dust mite is most common cause of allergic rhinitis and asthma. A dust mite is a microscopic, eight-legged insect. More than 100,000 dust mites can be in a single gram of dust. People are not allergic to the dust mite itself, but to dust mite feces. Dust mites eat the microscopic skin dander found on people and animals, then leave droppings. Each dust mite can produce approximately 20 droppings each day. Dust mites are found on people, animals and on almost every surface in homes, including carpet, upholstered furniture, mattresses and box springs, sheets and blankets, pillows and stuffed animals. When dead dust mites and dust mite droppings become airborne and are inhaled, they may produce an allergic reaction.

Bed bugs are found throughout the World. They hide in cracks and crevices during the day and come out at night to feed. The Bedbug is wingless and therefor it is likely to be found near to where the host sleeps, in the mattress or bed frame, behind wallpaper and in furniture. Although they can ingest up to 7 times their body weight in blood in one feed, they can also survive long periods without feeding.After mating takes place, Bedbugs will lay up to 200 eggs. .