Why Asthma Makes You Cough

By Spader, Catherine, RN

When is a cough more than just an annoying tickle in your throat? If you have a cough that won't go away, you may have asthma. A chronic cough is one of the symptoms of asthma. For some people, a cough may be their only asthma symptom. Asthma medications can relieve your nagging cough and keep you feeling good.

What Is Asthma?

Asthma is a chronic, or ongoing, lung disease marked by inflammation and swelling of the airways in your lungs. When you have an asthma attack, your airways overreact to certain triggers, such as exercise, a cold, dust or pollen. This reaction causes inflammation, irritation, swelling, and tightening of your airways, making breathing difficult.

Why Does Asthma Make You Cough?

When your airways are inflamed, it makes it hard for air to flow into your lungs. This can cause coughing and other asthma symptoms. Asthma symptoms include chest tightness, difficulty breathing, and wheezing—a high pitched whistling sound you make when breathing. The thin layer of muscle surrounding your airways react by tightening, further blocking airflow. Your mucus production increases and makes your breathing and coughing troubles even worse.

What Is Cough-Variant Asthma?

Sometimes the only symptom of asthma is a cough that won't go away. If your cough lasts six weeks or longer you may have cough-variant asthma. With cough-variant asthma, you generally don't have other typical asthma symptoms, such as shortness of breath and wheezing.

Cough-variant asthma may:

  • Increase at night and keep you from sleeping

  • Worsen when you are exercising

  • Worsen when you have a cold

  • Worsen when you are exposed to dust, cold air, air pollution, or other asthma triggers

Many people with cough-variant asthma don't know they have asthma since coughing is the only symptom. If you have a cough that won't go away, you should see your doctor for an accurate diagnosis.

How Should an Asthma Cough Be Treated?

If your doctor diagnoses you with cough-variant asthma, treatment is generally the same as treatment for other types of asthma. Your cough should get better gradually with the use of these common asthma medications:

  • Quick-relief medications rapidly relieve coughing and other asthma symptoms, such as wheezing and shortness of breath. You generally take quick-relief medications by breathing them into your lungs with an inhaler. A commonly prescribed quick-relief medication is albuterol (ProAir, Proventil, Ventolin), a bronchodilator that relieves your cough by relaxing and opening your narrowed airways.

  • Inhaled corticosteroids (steroids) help relieve your cough by reducing airway inflammation.

Will Over-the-Counter Cough Medicine Help?

Over-the-counter (OTC) cough syrups and medications will not help your cough caused by asthma. In fact, they can actually make your asthma symptoms worse. The best way to treat your cough is to follow your asthma treatment plan and check with your doctor before trying any OTC medications. With the right treatment, your asthma can be controlled and your cough relieved.

Medical Reviewer: William C. Lloyd III, MD, FACS Last Annual Review Date: Dec. 15, 2013 Copyright: © Copyright 2013 Health Grades, Inc. All rights reserved. May not be reproduced or reprinted without permission from Health Grades, Inc. Use of this information is governed by the HealthGrades User Agreement.

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Asthma is more common in boys than girls.