Pollen - Also known as hay fever, this common warm-weather allergen is triggered when flowers and trees are in bloom and pollen spores get blown into the wind, swarming around until landing and causing someone a runny nose or itchy eyes. Pollen particles range in size from 1 micron to 100 microns and can be suspended in the air for long periods of time, before eventually being breathed into your respiratory system.
Ragweeds - Ragweeds and other grasses are actually annual and perennial herbs and shrubs. Although they might be common outside many homes, they’re filled with allergy triggers and their spores can travel up to hundreds of miles, before finally settling and disrupting healthy immune systems.
Dust Mites - These microscopic insects can live in and around your home. Even worse, they thrive in the warm summer months. Dust mites are attracted to body heat and often attach themselves to bedding and pillows, where they reproduce and can trigger severe allergy and asthma symptoms.