Will lung function improve after quitting smoking?

If smoking is stopped early and the smoking history is relatively short, lung function usually improves. However, if the condition is severe, lung function may not significantly improve after quitting smoking. It is advisable to seek timely medical attention and undergo symptomatic treatment under the guidance of a qualified physician.

If smokers quit smoking at an earlier stage and have a relatively shorter smoking history, the lung tissue and other organs affected by smoking may partially recover. Particularly for those who have smoked for only a short time and smoked relatively few cigarettes, the body's self-repair mechanisms, including the self-cleaning function of the respiratory system, can potentially restore lung function to normal levels. Younger smokers who quit may experience greater improvement in lung function due to their stronger metabolic and tissue repair capabilities.

However, it is important to note that for smokers with severe lung diseases such as chronic obstructive pulmonary disease (COPD), although quitting smoking can prevent further disease progression, already damaged lung function might not fully return to the level of someone who has never smoked. While quitting can slow disease progression, reduce the risk of acute exacerbations, and improve quality of life, existing lung damage may be permanent. Therefore, although quitting smoking is beneficial for these patients, improvements in lung function may be limited.

In daily life, it is recommended to quit smoking as early as possible to protect lung health. Engaging in appropriate physical activities such as running or playing sports can also contribute to overall health improvement.