The most dangerous allergen for asthmatics is dust. This is mainly because dust is everywhere and there are little things to be done in order to avoid it or at least diminish the quantities of dust present in the air. The only places where dust can be controlled and its effects can be prevented are the house and the office. The places where one lives and works can become safe environments for the asthmatics if they are cleaned regularly and vacuumed at least twice a week or even more, while the furniture must be dusted every day.

Another allergens which can trigger asthma are dust mites. There are just as hard to get rid of as dust, yet with a proper filtration system and with constant cleaning of the objects from the house they can be kept away from the house for a long period of time.

Mold is also a very dangerous allergen. It usually appears when there is too much humidity inside the house. Thus a dehumidifier and constant cleaning of the house can destroy it and maintain the environment safe even for an asthmatic.

During spring and summer, if you suffer from asthma, it is advisable that you stay as much as possible indoors, with the windows closed. This is mainly because the pollen is very dangerous for asthmatics, being the cause of many asthma attacks. If it absolutely necessary to leave the house, then make sure that you do it at noon, and not in the morning or evening, when the concentration of pollen is high. Also wear a pollen or dust mask that will protect you against the harmful effects pollen can have on you.