Asthma is a chronic disease that affects the function and lining of the airways or tubes of the lungs. It narrows the airways and makes it difficult to breathe.
There are different degrees of asthma. Some children may have mild asthma with rare flare-ups. Others may have a severe, constant asthma.
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The exact causes of asthma are unknown, but genetics play a role.
Tightening of the muscles around the airway and chronic inflammation with swelling cause airways to narrow. This makes it hard to breathe.
Certain conditions are known to trigger an asthma attack. These include:
- Respiratory infection—more common in younger children
- Exercise, especially in cold air—more common in teenagers
Substances that cause allergies such as:
- Animal dander
- Food, rarely
- Sinus infections
- Tobacco smoke or other chemical irritants
- Sudden change in weather
Factors that may increase your child’s chance of asthma include:
- Family history
- History of allergies and/or eczema
- Exposure to tobacco smoke
- Respiratory infections before age 1, especially bronchiolitis, and common colds before 6 months of age
- Premature birth
- Chlorinated pool use in children who are already at risk for asthma
- Taking some medications, such as aspirin or other non-steroidal anti-inflammatory drugs
You will be asked about your child’s symptoms and medical history. A physical exam will be done. The doctor will listen to your child’s lungs. Your child may be referred to a specialist. A pulmonologist focuses on the lungs. An allergist/immunologist focuses on allergies.
Your child may be tested for common allergens that may trigger symptoms. This can be done with skin testing or blood tests.
Your child's lungs may be tested. This can be done with:
- Spirometry test
- Challenge test
- Medication trial
Your child's oxygen concentration may be measured. This can be done with pulse oximetry.
Images may be taken of your child's bodily structures. This can be done with x-ray.
Talk with the doctor about the best plan for your child. You and your child's doctor should also create an asthma action plan. This is a plan your child will follow to help control asthma, handle asthma attacks, and prevent restrictions on your child's activities. Treatment will vary based on age, symptoms, and the number of asthma episodes your child has. It is important that you stick to your child's treatment plan.
Treatment options include the following:
Exercise may help build lung reserve, so treatment should allow your child to have normal exercise and activity levels, including sports.
You can help your child reduce the chance of triggering an asthma attack by making lifestyle changes, such as:
- Know what your child is allergic to and avoid known triggers. These may include certain pollen, dust, foods, and air pollution.
- Avoid outside activities if there are high levels of air pollution, pollen, or mold spores.
- Keep your windows closed during seasons with high pollen or mold spores. Air conditioning may help filter out allergens during warm seasons.
- Consider getting a portable HEPA unit air cleaner to use in sleeping areas, for your heating/cooling system, and your vacuum cleaner.
- Avoid exposing your child to tobacco smoke.
- Have proper heating, cooling, and ventilation systems in your home.
- Keep the humidity down in your house. This may help prevent the growth of mold.
Medications used to treat asthma fall into one of 2 categories:
Long-term medications are used to avoid asthma attacks, but will not treat an existing attack. Medication may include any combinations of:
- Inhaled corticosteroids to prevent airway swelling and inflammation
- Inhaled long-acting beta agonists relax the airways and keep them from tightening
- Oral leukotriene modifiers to prevent airway inflammation and swelling, decrease the amount of mucus in the lungs, and open the airways
- Inhaled cromolyn or nedocromil to prevent airways from swelling from contact with an asthma trigger
- Oral theophylline to relax the airways
Short-term control medications are used to treat an asthma attack. Medication may include:
- Inhaled quick-acting beta agonists and anticholinergic agents to open the airways
- Oral corticosteroids to reduce severe airway inflammation
In addition to the medications, children should get all recommended vaccinations.
- Children older than 6 months should get a yearly flu shot.
- Children with asthma are at a higher risk of having complications from the flu.
There are no known ways to prevent your child from developing asthma. You can encourage your child with asthma to reduce the risk of asthma episodes by following the treatment plan and avoiding triggers. General guidelines include:
- Have regular follow-up with your doctor.
- Avoid strong chemicals or odors like perfume.
- Avoid challenging outdoor exercise during days with high air pollution, a high pollen count, or a high ozone level.
- If cold weather triggers your asthma, avoid strenuous activities in cold weather. If you must, use a scarf or mask to warm the air before it reaches your lungs.
- Avoid secondhand smoke. Do not allow anyone to smoke in your home.
- Don't use a wood-burning stove or fireplace, including unvented gas fireplaces.
Allergy shots may be considered to reduce reactions to allergy triggers.
Your doctor may want to monitor your child at home with a peak flow meter.
This content is reviewed regularly and is updated when new and relevant evidence is made available. This information is neither intended nor implied to be a substitute for professional medical advice. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with questions regarding a medical condition.
Edits to original content made by Denver Health.
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American Academy of Allergy, Asthma, & Immunology http://www.aaaai.org
Asthma and Allergy Foundation of America http://www.aafa.org
Asthma Society of Canada http://www.asthma.ca
The Lung Association http://www.lung.ca
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