(Last Updated On: June 27, 2023)

Can Asthma Turn Into COPD?

Asthma and chronic obstructive pulmonary disease (COPD) are two chronic airway diseases that can cause significant health problems if not managed properly. Studies have shown an association between asthma and COPD, with some patients experiencing a progression from one condition to the other over time. This progression occurs when chronic inflammation leads to structural changes in the airways, causing them to narrow permanently.

However, proper care and pulmonary rehabilitation can help manage both conditions and improve lung health. Pulmonary rehabilitation helps patients improve their lung function through exercise training, breathing techniques, education on how to manage symptoms, and counseling.

Patients with either condition must work closely with their healthcare provider to manage their symptoms. This includes taking medications as prescribed, avoiding triggers, getting regular check-ups, and eating a healthy diet rich in fruits and vegetables.

Mature male laying on couch treating COPD with Nebulizer

Symptoms and Risk Factors

Symptoms of Asthma

The signs of asthma include wheezing, coughing, shortness of breath, chest tightness or pain, and difficulty breathing. These symptoms may be triggered by physical activity or allergens such as pollen or dust mites.

In some cases, asthma may be mild and infrequent while others experience severe attacks that require hospitalization. A study published in the Journal of Allergy and Clinical Immunology found that nearly 10% of adults with asthma had frequent severe attacks that impacted their quality of life.

Risk Factors for Asthma

Knowing the risk factors for asthma can help determine an individual patient’s likelihood of developing the condition. Some common risk factors include:

  • Family history. People with a family history of allergies or asthma are more likely to develop asthma.
  • Exposure to allergens. Exposure to dust mites, pollen, pet dander, or mold spores can trigger an allergic reaction leading to asthma.
  • Age. Children under five years old are at higher risk for developing asthma than older children or adults.

Symptoms of COPD

The most common signs of COPD include chronic coughing (with or without mucus), shortness of breath, wheezing, chest tightness or pain, and frequent respiratory infections.

COPD is typically diagnosed in adults over the age of 40 who have a history of smoking or exposure to air pollution. However, non-smokers can also develop COPD due to long-term exposure to pollutants such as dust or chemicals.

Risk Factors for COPD

People with more risk factors for COPD are more likely to develop the condition. Some common risk factors include:

  • Smoking. Cigarette smoking is the leading cause of COPD worldwide.
  • Exposure to air pollution. Long-term exposure to pollutants like dust, fumes, and chemicals can cause lung damage leading to COPD.
  • Age. Older adults are more likely to develop COPD.


Diagnosing Asthma

Diagnosing asthma involves evaluating symptoms such as wheezing, shortness of breath, and chest tightness. Physicians will ask about when these symptoms occur and what triggers them. They may also conduct a physical exam to listen for wheezing or other abnormal sounds in the lungs.

To confirm an asthma diagnosis, doctors will often perform pulmonary function tests to measure airway function. One common test is called spirometry with bronchodilator testing. This involves measuring lung function before and after using an inhaler medication that helps open up the airways.

Another tool for diagnosing asthma is peak flow monitoring. This involves using a handheld device called a peak flow meter to measure how quickly a person can exhale air. This test is often used to track changes in lung function over time and adjust treatment plans as needed.

Diagnosing COPD

Diagnosing COPD involves examining the patient’s medical history, conducting a physical exam, and performing tests to measure lung function. One of the primary ways doctors measure adult lung function is through spirometry. This test assesses the amount of air a person can exhale forcefully after taking a deep breath. Specifically, it measures two key parameters: forced expiratory volume in one second (FEV1) and forced vital capacity (FVC). FEV1 measures how much air you can exhale in one second, while FVC measures how much air you can exhale overall.

In addition to spirometry, physicians may use other tests such as chest X-rays or CT scans to look for signs of emphysema or other lung diseases. Blood tests may also be used to check for alpha-1 antitrypsin deficiency, which is a genetic condition that can lead to COPD.


Studies suggest that up to 8% of the population have self-reported asthma and around 5% have self-reported COPD. However, these estimates may not accurately reflect the prevalence of these conditions. Studies show that up to 30% of individuals who self-diagnose with asthma do not actually have the condition based on objective testing.

Misdiagnosis or underdiagnosis can occur when individuals attempt to diagnose themselves without seeking medical advice or undergoing objective testing. Patients require an accurate diagnosis to receive proper treatment. Without proper treatment, they may experience worsening symptoms or complications from their condition.

Relationship between Asthma and COPD

Asthma and COPD are both respiratory conditions that can cause shortness of breath, wheezing, and coughing. However, they have different causes and treatments. Asthma is often triggered by allergens or irritants such as pollen, dust mites, smoke, or exercise. On the other hand, COPD is typically caused by long-term exposure to irritants such as cigarette smoke, air pollution, or occupational dust and chemicals.

Studies have shown that individuals with asthma may be at an increased risk of developing COPD later in life. This is thought to be due to factors such as chronic inflammation and changes in the airway wall that can lead to decreased lung growth over time.

In some cases, individuals with both asthma and COPD may be diagnosed with asthma-COPD overlap syndrome (ACOS). This is a complex condition that requires careful management by a physician with experience treating both asthma and COPD.

Patients with ACOS often experience exacerbations or acute episodes of worsening respiratory symptoms that require medical attention. These exacerbations can be triggered by environmental factors such as pollution or allergens. In some cases, the onset of exacerbations may be sudden and severe, leading to hospitalization.

However, while asthma and COPD can coexist in some individuals due to overlapping symptoms and risk factors, asthma does not necessarily develop into COPD over time. Studies have shown that only a small percentage of people with asthma go on to develop COPD later in life. In fact, most people with asthma do not develop any other respiratory conditions.

How Can an Air Purifier Help with Asthma and COPD?

Air purifiers have become increasingly popular in recent years, and for good reason. These devices improve the air quality in your home by removing harmful pollutants and irritants that can trigger asthma and COPD symptoms. An air purifier can help those with respiratory conditions by:

  • Reducing indoor air pollution. A study published in the American Review of Respiratory Disease found that using air purifiers can reduce indoor air pollution levels, which is especially beneficial for people with COPD. The study also showed that using an air purifier improved lung function in individuals with moderate to severe COPD.
  • Capturing small particles. Air purifiers can capture small particles like pollen, dust mites, and pet dander. These tiny particles can easily enter our lungs and cause irritation or inflammation, triggering asthma or COPD symptoms. High-efficiency particulate air (HEPA) filters are particularly effective at capturing these small particles.
  • Removing odors and chemicals. Some air purifiers come equipped with activated carbon filters that absorb odors and chemicals from the air, which can be particularly helpful for people with chemical sensitivities. For example, an activated carbon filter may help remove the smell of cigarette smoke or paint fumes from the air.

When selecting an air purifier for your home, make sure to choose one that is appropriately sized for the room it will be used in. A small unit may not effectively clean a large space, while a large unit may be overkill for a small room. You’ll also need to replace filters as recommended by the manufacturer to ensure optimal performance.


The relationship between asthma and COPD is complex and not fully understood. While asthma and COPD share similar symptoms, risk factors, and inflammatory processes, they are distinct conditions with different underlying mechanisms.

It is possible for individuals with long-standing asthma to develop COPD over time, especially if they smoke or are exposed to other environmental irritants. However, not everyone with asthma will develop COPD, and most people with COPD do not have a history of asthma.

Diagnosis of asthma or COPD requires careful evaluation by a healthcare provider using pulmonary function tests, imaging studies, and symptom assessment. Treatment options also differ between the two conditions, although there may be some overlap in medications used.

Regardless of whether someone has asthma, COPD, or both, they can manage their symptoms with lifestyle modifications such as avoiding triggers, using an air purifier, and taking medication as prescribed.

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