Respiratory tract infections, strenuous exercise, air pollution, second-hand smoke and cold food are some of the more common causes of asthma in children. In addition to keeping children warm when the weather changes, parents should also avoid exposure to second-hand smoke and pay attention to air pollution. In addition, 40% to 60% of children will cough after eating ice, so parents should also be aware of this. What are the precautions for dust mite allergy? 1. The carpet must be taken off, otherwise even if you spray anti-mites regularly for a long time, sometimes there is no way to inhibit the growth of dust mites and their excretion. 2.Beds should be constructed with wood or metal. Try not to use animal blankets, bedspreads and quilts on the bed. Pillows and quilts should be made of chemical fibers as much as possible, and it is especially important that all bedding, including pillows, quilts and mattresses, should be wrapped up with special mite resistant bedding and covered with ordinary pillowcases or quilt covers outside. Every two weeks, you should wash your bedding with hot water at 55 degrees or above, and mite proof bedding should be washed once or twice a year. 3. Avoid using heavy curtains and use blinds or plastic shades instead. If you have to use curtains, you should always wash them or spray them with mite removal solvent in the top period. 4. Replace stuffed furniture with wood or plastic products, or use leather and cloth furniture treated with anti-mite effect. 5. To keep the bedroom and storage room doors closed. 6.Use dehumidifier, air conditioner and mite air filter to keep the air clean and the temperature and humidity stable in the bedroom. The temperature should be kept around 25 degrees, and the humidity should be between 55 degrees and 65 degrees, and the filter should be cleaned from time to time to reduce the growth of dust mites and flying. 7.Avoid placing banners, hanging silk knotted products, ornaments and other things that can easily accumulate dust. 8.Use vacuum cleaners that can filter allergens or more multi-layer material dust bags to reduce the release of allergens. 9, do not keep cats, dogs, birds and other pets indoors.