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Asthma vs COPD: 6 Ways to Tell the Difference


Asthma and chronic obstructive pulmonary disease (COPD) are often mistaken for one another. It’s easy to understand why, as they’re both respiratory conditions that can cause symptoms such as coughing, wheezing, and shortness of breath.

But asthma and COPD are actually very different diseases, and understanding what distinguishes one from the other is crucial to receiving a correct diagnosis and effective treatment. Here are six differentiating characteristics to be mindful of.

1. Age of Onset

According to Healthline.com, the age a person is when the disease presents itself is “often the distinguishing feature between COPD and asthma,” as they are quite different.

With asthma, the source says people are commonly diagnosed as children. While the onset of COPD tends to be in “adults over the age of 40 who are current or former smokers.”

2. Causes

The exact cause of asthma is still unknown to medical professionals, although they suspect that it may be due to both genetic and environmental factors. These environmental factors can include exposure to triggers such as pollen, dust, mold, and smoke.

With COPD, however, EverydayHealth.com says the cause “is much more clear-cut.” Smoking is far and away the primary reason people develop the disease, and is “attributed to about 85 to 90 percent of all COPD deaths.” The source adds that exposure to air pollution, certain chemicals, and secondhand smoke can also be responsible. As can a genetic defect known as alpha-1 antitrypsin deficiency (AAT), but only in approximately 2 to 3 percent of diagnoses.

3. Triggers

As mentioned earlier, asthma is often triggered by exposure to certain substances, like pollen, dust, mold, and smoke. The Lung Institute adds that cold air and physical exercise may also worsen symptoms.

With COPD, the source says symptoms are often triggered by “respiratory tract infections like pneumonia and influenza.” In some cases, however, MedicalNewsToday.com says “People with COPD may have symptoms when they are active or at rest, without a known trigger.”

4. Symptoms

While the symptoms of asthma and COPD—such as coughing, wheezing, and shortness of breath—may seem very similar, there are subtle differences. For instance, a chronic cough in people with COPD tends to produce a lot more mucus and phlegm than those with asthma would experience.

Additionally, in those with asthma MedicineNet.com says “breathing can return to normal between attacks,” but with COPD it typically does not. COPD symptoms also tend to worsen over time, which is less common with asthma.

5. Treatment

Although the medications—such as bronchodilators and inhaled steroids—used to treat asthma and COPD are similar, the treatments and therapies prescribed for each is different. EverydayHealth.com says those with asthma “are encouraged to avoid their personal triggers, like keeping pets out of their home or avoiding the outdoors when triggers like tree pollen are high.” They may also opt for a procedure called bronchial thermoplasty, where muscles in the airway are burned off to reduce constriction.

While the source says people with COPD are also told to avoid triggers, it is more important that they stop smoking (if they haven’t already) in order to “help prevent further damage to the lungs.” In addition to this, as well as any prescribed medications, therapies and treatments for people with COPD include oxygen and pulmonary rehabilitation, or lung volume reduction surgeries and lung transplants in serious cases.

6. Outlook

While neither asthma nor COPD are considered curable conditions, Healthline.com says their outlooks are quite different. “Asthma,” the source says, “tends to be more easily controlled on a daily basis,” through proper diagnosis and treatment.

COPD, however, is a progressive condition, meaning the symptoms typically get worse over time. But quitting smoking, reducing exposure to triggers, and adhering to a physician-prescribed treatment plan can help to reduce symptoms and slow the disease’s progression.

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