Mites and people actually live together, but people do not realize that there are a large number of mites in almost every bed, but because it is too small, and hiding in the mattress, pillow, carpet, straw mat, Simmons, clothes, people often can not see clearly. Until the end of the last century, medical professionals have recognized that the development of asthma in some patients is related to the environment in which they live. In the 1960s, with the development of immunology and metamorphosis, scientists finally confirmed that dust mites in the bedroom can cause asthma.

The environment inside the bed room is stable, the temperature and humidity conditions are suitable, and the food is rich. Besides people, it is also a good place for many small organisms to reproduce and grow.

There are more than 40 kinds of indoor mites, and more than 10 kinds related to human diseases. Some are native species, others invade from outside in a variety of other ways. They mainly include:

Ectoparasitic types: Sarcoptes scabiei and Demodex mites in humans, parasitic mites on pets;

The parasitic types of the lumen: Acaroid mites, Acaroid mites and Acaroid mites, etc.

Blood-sucking and stinging types of animals (such as chickens, pigeons, dogs, cats and insects), such as Dermatophagoides sphaeroides and pteronicidae;

Outdoor occasional invasive types - chigger mites and insect parasitic typha mites, etc.

Types of growth and reproduction in stored food -- storage mites such as acaroid mites and carnivorous mites;

Types of house dust - such as dust mites and acaroid mites.