1, pollen People who are allergic to pollen should pay special attention to the “pollen forecast” and take the following preventive measures during the peak pollen season: reduce the time of natural ventilation in the living room; also pay attention to closing the windows when driving; wear glasses and a mask when going out. 2, dust mites old mattresses, pillows, bedding (especially down quilts), thick carpets, sofa cushions have a large number of dust mites. For dust mites, the following preventive measures can be taken: every 1 to 2 weeks, scald the sheets, bedspreads and other bedding with hot water above 55℃ to kill dust mites. If possible, scalding with hot water above 100℃ can also denature the allergenic proteins in dust mites, which is more effective. In addition, mattresses and pillows should be installed in dust covers to prevent patients from inhaling dust mite allergens. 3, fungus Since fungi are very easy to grow in a warm, humid environment, it is advisable for people allergic to fungi to take the following preventive measures: avoid excessive indoor humidity, you can keep the indoor air dry through air conditioning, ventilation and heating systems; people allergic to fungi should not engage in the work of the Yang field (such as drying grain, etc.); timely repair of indoor leaking parts; indoor should not be stacked with wood or other waste that is prone to mold; There are more fungal spores in decaying vegetation, so care needs to be taken when weeding. 4, pets and cockroaches Pets and cockroaches are also the main cause of allergic rhinitis, and even allergic asthma. Contact with pet dander, hair, excrement, etc. causes allergic rhinitis or asthma. Therefore, people who are allergic to pets should try not to keep them. Destroy the environment on which cockroaches live in order to completely eliminate cockroaches, such as using insecticides that kill cockroaches, keep the room dry on weekdays, and often clean the floor, bedding, curtains, clothing, etc.