The first thing to remember – humidity is important for dust mites: 70% to 75% of a dust mite’s body weight is water, and by absorbing water vapor from the air, dust mites can largely maintain internal water balance. For dust mites, the key humidity is 55% to 75% at temperatures between 15°C and 35°C, so keeping gout dry is important to kill dust mites. Mite bodies and mite excretions are the source of many allergens: 1. mite excretions (enzymes) – produced in the mite’s digestive tract; 2. molting; 3. saliva left on food residues when the mite feeds; 4. secretion of fluids from short rivulets of glands associated with active mite absorption; 5. soluble proteins in body fluids after the mite dies and during carcass decomposition are released. Dust mites and house dust mites – The vast majority of the world’s dwellings have a coexistence of dust mites and house dust mites. One type of mite is often predominant in each room and accounts for more than 70% of the total number of mites. Dust mites can cause allergic rhinitis, asthma, urticaria, dermatitis, with rapid or late onset (3.5-8.5h). Dust mites can cause atopic (allergic) dermatitis by: 1) directly through the skin, and 2) through inhalation of dust mite allergens. Dust mite control goals: 1. reduce the total number of live mites; 2. reduce the level of mite allergens; 3. reduce human exposure to dust mites and their allergens. Dust mite control principles: three points: (dust mite) fear of light, heat and dryness. One principle: reduce the level of mite allergens Dust mite control methods: 1. reduce the relative humidity in the room: use air conditioners, dehumidifiers or open windows and ventilate according to the season and climate (humidity less than 50%); 2. use packing sets: the width of young mites is generally greater than 50 microns, so fabrics less than or equal to 20 microns can stop all mites from passing through; 3. washing, drying and dry cleaning of bedding: ordinary laundry detergent at 25°C and at least 5 minutes conditions can remove the majority of mites and cat hair allergens; 4. Carpets, curtains and home décor (furniture): use polished wood floors, vinyl floors, floor tiles, use leather, vinyl, wood furniture; 5. Replace curtains: use scrubbable blinds instead or wash them frequently; 6. Try not to live in the basement; 7. Freeze soft toys and small items: -17℃ to -20℃ freeze soft toys and small items (such as pillows and special clothing) for at least 24 hours. Wash items after freezing to remove dead mites and allergens; 8. Carpet vacuuming: Use a high-performance vacuum cleaner (mite prevention performance requirements: the bag of the vacuum cleaner should be double or central vacuum cleaner end leads to the outdoors).