What is asthma?
Asthma is a disease of the respiratory system. Its chief feature is difficult breathing,
often accompanied by a wheezing or whistling sound during exhalation. Asthma attacks
occur at varying intervals, and the seriousness of the attacks can vary. Between
attacks, asthmatics are usually completely free of respiratory symptoms.
What happens during an asthmatic attack?
During an asthmatic attack, the muscles of the smaller bronchi and lungs go into
a spasm. The airways narrow and it is more difficult for air to get in and out of
the lungs. The lining of the airways becomes congested and swollen and secretes
excess mucus, which adds to the breathing problem.
What causes an asthmatic attack?
An asthma attack may be caused by many different things including allergies, respiratory
infections, and behavioral and environmental factors.
When allergic asthma occurs mostly in the spring and summer, usually pollen or mold
is the cause. When it does not follow a seasonal pattern, it is usually caused by
dust, animal dander, food, or drugs.
Respiratory infections are responsible for some asthmatic attacks. This usually
occurs in the winter when the largest number of respiratory infections occurs.
Behavioral and environmental factors account for about one-third of all asthmatic
attacks. The factors include emotional stress, physical activity, smoking or smoky
rooms, and vapors from cleaning products, paint, hair spray, and scents and perfumes.
How can an asthmatic attack be prevented?
When should a doctor be called?
A doctor should be notified if:
What should be done if a severe attack develops?
If a severe attack develops, you must get medical help immediately, go to an emergency
room, or call 911 for emergency transportation to a hospital.
** How to Use an Albuterol Inhaler
**How to Use a Diskus-type Inhaler
For more information, please see