Air conditioning lessens the quantity of the airborne pollen from the grasses, weeds, and trees which finds its way to the indoors. It also lowers the indoor humidity, and also might decrease the exposure to the dust mites. In case of not having the air conditioning then try to keep the windows must close during the period of pollen season.
Reduce the dust that might worsen the nighttime signs by the replacement of the specific kinds of stuff in the bedroom. Like mattresses, springs box, and the encase pillows in the dustproof covers. Try to remove the carpeting system and install linoleum flooring or the hardwood. Always use the washable blinds and the curtains.