Pollen from plants

While they might be pretty to look at, flowers, trees and shrubs can touch-off a bout with asthma. Keep fresh flowers out of your home and bedroom. During peak pollen season (May, June, August and September), plan indoor activities as often as possible. You may pick up plant pollen just by being outside. If you have to play or work outside, remember to wear a hat and take a shower and wash your hair as soon as you go back inside to get rid of the pollen that aggravates your asthma. When traveling, drive with your windows closed and air conditioning on.