Many people experience similar symptoms after quitting smoking. When a person smokes, chemicals in cigarette smoke damage and paralyze the tiny cilia lining the airways. These cilia are responsible for sweeping out dirt and mucus.

When smoking stops, this natural cleaning mechanism gradually reactivates. This process involves expelling accumulated mucus, which can lead to increased coughing in the initial stages after quitting. Lung function begins to improve within a few weeks of stopping smoking, but respiratory symptoms may fluctuate initially as the body adjusts. Therefore, coughing after quitting smoking does not necessarily mean worsening lung function; it can be a sign that the lungs are recovering.

Within a few months, coughing and wheezing typically decrease as the airways become less inflamed and clearer. However, for individuals with pre-existing chronic lung disease caused by smoking, symptoms may persist longer or require supportive treatment.

Doctor Thuan examines a young man. Illustration: Tam Anh General Hospital

If a cough and chest tightness persist for many weeks without improvement, accompanied by signs such as increasing shortness of breath, coughing up blood, or unexplained weight loss, a medical consultation is necessary. Quitting smoking reduces the risk of lung cancer and chronic lung disease, but it cannot reverse damage that has already occurred.

According to the World Health Organization (WHO), stopping smoking at any point offers clear health benefits, even after many years of smoking. The risk of cardiovascular disease and cancer gradually decreases over time after quitting.

It is advisable to consult a respiratory specialist for a proper assessment and suitable treatment.

Doctor Nguyen Minh Thuan, First Degree Specialist

Department of General Internal Medicine

Tam Anh General Hospital, TP HCM