Dust mites are important allergens that trigger allergic diseases such as asthma, allergic rhinitis and eczema. 1. What are dust mites? Dust mites are tiny organisms, the size of a needle point, which can be seen with the naked eye. There are a large number of dust mites growing in house dust, about 150 species. 2.Where do dust mites hide? Dust mites are especially suited to growing in warm and humid environments. Dust mites mainly breed in bedding and clothing, such as cotton and its products, wool, feathers and linen, etc. Chemical fibers can also grow in large quantities. They are most prevalent in mattresses, pillows, carpets and sofas in bedrooms, and can also breed in clothes that are not washed frequently. Bedding and carpets in the bedroom are also the most suitable breeding places for dust mites, and sofas are also places that harbor more mites. 3.How to prevent dust mite allergy? (1) The bedroom is often the main place for dust mites to breed, avoid clutter, easy to clean, do not use carpets, do not keep pets, reduce the conditions for dust mites to breed. (2) bedding, pillows, clothes, curtains, etc., wash and sunshine, beds and bedding should be weekly often sunshine patting, which will be the dust, dander and mites and other patting out. (3) Washable bedding, such as bedspreads, covers, etc. should be about 10 days every other day with more than 55 degrees of hot water to kill dust mites, with 100 degrees of boiling water is better. (4) Pillow core is very easy to accumulate dust and dust mite breeding, should be replaced once every 1-3 years.