Can my father’s lungs recover after decades of smoking?

Question

Hello doctor,

I would like some guidance regarding my father’s smoking habit and how we can help him quit effectively.

He is 54 years old and has been smoking for nearly 30 years. Recently, I showed him anti-smoking campaign materials from our local health center, but he dismissed them and does not seem to believe the health risks being discussed.

Over the past year, he has developed a persistent morning cough with yellowish phlegm. He also underwent spirometry last month, which showed an FEV1/FVC ratio of 0.68, and the chest specialist mentioned this was concerning airway obstruction.

In addition, a patch of leukoplakia was identified in his mouth about six months ago. He is also taking Amlodipine for hypertension.

I wanted to ask:

At this stage, can quitting smoking still significantly improve his lung function and reduce his cancer risk?
How reversible are smoking-related changes once someone has smoked for decades?
Would treatments such as nicotine replacement therapy or Varenicline still be effective in someone like him?
Most importantly, how can we approach and motivate someone who completely dismisses anti-smoking campaign messaging and does not feel personally concerned about the risks?

I would really appreciate your advice on both the medical and practical aspects of helping him quit.

Please help.

Thank you.

Answer 1

Hello,

Welcome to icliniq.com.

Thank you for reaching out. I can completely understand your concern for your father, especially given his long smoking history and the symptoms he has now developed.

The fact that he has started reducing or considering stopping smoking is already a very important and positive step. Even after many years of smoking, quitting can still provide major health benefits and significantly reduce the risk of further lung damage, heart disease, stroke, and several cancers.

Regarding his symptoms, a persistent morning cough with yellowish phlegm, along with an FEV1 (forced expiratory volume in 1 second)/FVC (forced vital capacity) ratio of 0.68, does suggest possible chronic airway obstruction, such as chronic obstructive pulmonary disease (COPD), which is commonly associated with long-term smoking. The leukoplakia identified in his mouth is also something that should continue to be monitored carefully, as smoking can contribute to changes in the oral tissues.

At this stage, further evaluation is important. A high-resolution CT (computed tomography) scan of the chest may be recommended by his treating physician to assess the lungs more thoroughly and rule out conditions such as emphysema, chronic bronchitis, or any suspicious lesions.

While it is natural to fear serious illnesses such as lung cancer, it is important to remember that many smoking-related conditions can be managed effectively, especially when identified early.

The most important step right now is not panic, but proper assessment and continued smoking cessation efforts.

You asked an important question about whether quitting now still makes a real difference. The answer is absolutely yes. After smoking cessation:

Lung inflammation begins to decrease.
The rate of lung function decline slows significantly.
Blood pressure and circulation improve.
Cancer risk gradually decreases over time.
The risk of heart attack and stroke also falls substantially.

Although some lung damage from long-term smoking may not be fully reversible, stopping smoking can still greatly improve quality of life and long-term outcomes.

Medications such as nicotine replacement therapy (patches, gums, lozenges) and Varenicline can still be very effective, even in long-term smokers, especially when combined with counseling and family support.

When someone dismisses anti-smoking campaigns, direct fear-based messaging often does not work well. In many cases, people respond better to calm, non-judgmental conversations focused on their personal health, daily symptoms, breathing ability, independence, and quality of life rather than statistics alone. Family encouragement, patience, and emotional support are often more effective than repeated warnings.

He should also continue taking his blood pressure medication regularly and remain under follow-up with his treating doctor.

Overall, this is a very important turning point for his health, and your support can make a meaningful difference in helping him move toward smoking cessation and better long-term health.

I hope this answers your query.

Please let me know if you need any help.

Thank you.