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Even for those who suffer mostly from exercise-induced asthma, Schreiber warned not to discount environmental factors. He noted that seasonal allergens can certainly further aggravate symptoms. “In my part of the country on the East Coast, the spring allergy season and summer heat and high humidity are pretty bad for people with asthma,” he explained. For this reason, it’s a good idea to pay close attention to whether or not your symptoms worsen during certain times of the year, and if so, also make note of weather reports to find out what allergens are most prevalent in your area.