Chronic obstructive pulmonary disease (COPD) and asthma are both conditions that cause coughing, wheezing and shortness of breath. Although it is easy to confuse them, it is important to know which condition you have so you can get the most effective treatment.
These are the primary differences between COPD and asthma:
When it starts
Asthma often begins in childhood. Symptoms can develop at any age though. COPD rarely begins before age 40.
How it progresses
Asthma may improve with treatment or may go away entirely, which often happens as a child grows up. COPD is a chronic, progressive condition that slowly gets worse.
Lung damage from COPD is not reversible. Even with treatment, COPD will continue to progress. Early treatment is important to slow or limit further lung damage.
Pattern of symptoms
Asthma symptoms tend to vary. Your breathing may change from day to day or may be “normal” for long periods with sudden “attacks” following exercise or exposure to allergens like dust or pollen.
COPD is a chronic condition with on-going symptoms. Fluctuations may cause “better” or “worse” days, but people with COPD rarely if ever have days without symptoms.
How lungs are affected
During an asthma attack, airways become inflamed and swell, limiting airflow.
In COPD, the air sacs inside the lungs become damaged which makes it hard to push air out of the lungs. This damage can also reduce the amount of oxygen transferred to the blood with each breath.
A person with asthma may have normal breathing most of the time or between “attacks”.
A person with COPD is more likely to have ongoing or constant breathing difficulties, including shortness of breath.
A person with asthma is likely to have a family history of asthma, or to have had asthma or allergies as a child.
COPD does not run in families. It most often follows a history of exposure to particles or gases such as those caused by tobacco smoke or biomass fuels like burning wood or animal waste.