1. Keeping your windows shut and staying indoors on dry and windy days, when pollen is more likely to get blown around, will help if you’re allergic to pollen. But staying inside on rainy or excessively humid days could help, too, if mold is what triggers your allergies. Though rain washes pollen away, fungus and mold spores love the humidity
Other Factors to prevent allergies
2. Certain household chemicals can aggravate or even cause both indoor and outdoor allergies. The primary culprit is triclosan, the active ingredient in antibacterial soaps. Scientists from the University of Michigan recently found that people who commonly used products containing the ingredient were more likely to suffer from allergies or hay fever.