While allergies and asthma usually are chronic, symptoms can flare from exposure to certain triggers.
The American Lung Association says these factors trigger asthma and allergy symptoms in many people:
Anything with powerful fumes, such as hair spray, paint or perfume.
Cold air.
Smoke from cigarettes, pipes, cigars or fireplaces.
Pollen, mold or dust mites.
Animal dander.
Air pollution.
Respiratory tract infections or reactions, stemming from sources such as the common cold or flu.