Dust mites are important allergens that induce allergic diseases such as asthma, allergic rhinitis and eczema. Mite bodies, excretions and metabolites can be allergens that cause various allergic diseases, collectively known as dust mite allergy. Dust mites are commonly found in indoor environments where humans live and work, such as bed sheets, covers, pillows, and even air conditioners and carpets where large numbers of dust mites can be found. Patients with chronic respiratory diseases such as asthma and bronchitis are advised to avoid carpeting at home, and to pay attention to keeping the room clean and hygienic and ventilate it regularly so as to avoid asthma or even allergy attacks. Dust mite distribution is worldwide and extremely widespread. There are many factors that contribute to the development of dust mite allergy, usually related to regional, occupational, exposure and genetic factors. Dust mite allergy is more prevalent in children than in adults, with about half of those affected having an attack by age 12. Dust mite asthma occurs in the spring and fall, and in a few cases, attacks can occur throughout the year. Characteristics of dust mite allergic reactions, dust mite allergy is an exogenous allergic reaction and patients often have a family history of allergy or a personal history of allergy. The nature of the allergen is thought to be from dust mite secretions, excretions, faded crusts or dead insects, especially since metabolites are more likely to be sensitized after bacterial and fungal action. Another opinion is that dust mites are mainly able to pool allergens in the house and their intestines are excellent environments for easy production of allergen breakdown products, so this argument suggests that dust mites themselves are not allergic. Although allergens are commonly found in the environment, the cause of the disease is mainly related to individual differences. Dust mite allergy often induces clinical disorders such as dust mite asthma, allergic rhinitis, and even dust mite induced eczema and dermatitis.