Strenuous physical exercise; some medicines; bad weather, such as thunderstorms, high humidity, or freezing temperatures; biomass smoke from burning wood, grass, or other vegetation; and some foods and food additives can trigger an asthma attack.

Strong emotional states can also lead to hyperventilation and an asthma attack.

Learn what triggers your attacks so that you can avoid the triggers whenever possible. Be alert for a possible attack when the triggers cannot be avoided.