Dust mites are most closely related to spiders and ticks, so they are not insects. They have eight hairy legs, no eyes, a mouth part group in front of the body) and a tough, translucent shell. A dust mite measures only about 1/4 to 1/3 of a mm. They only can be seen by a microscope. They feed mainly on the tiny flakes of human and animal skin that shed each day. These flakes work their way deep into the inner layers of pillows, bedding, bed springs, blankets, bed sheets, furniture, rugs, carpets, curtains, fabric sheets, pet beds, as well as the interiors of automobiles and even some soft toys. They like it dark, warm and moist.
Dust mite may not bite or harm you. But if you have allergies or asthma on your family or your babies, they will cause runny nose, sneezing, itchy skin, eye itchy, itchy nose, mouth or throat or even cough. These sign of terms will cause you difficult to breath, chest pain, breathing with sound and hard to sleep.