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For years, lung cancer was considered a disease that mainly affected smokers. However, doctors are now seeing a growing number of lung cancer cases in people who have never smoked. Many of these patients are women, younger adults, and individuals with no obvious lifestyle- risk factors, highlighting that smoking is not the only cause of the disease.

Lung Cancer Isn’t Limited to Smokers

While smoking remains the leading cause of lung cancer worldwide, a significant number of cases now occur in people who have never used tobacco. Experts believe these cancers often develop differently from smoking- lung cancers and may be linked to specific genetic changes that occur over time in lung cells rather than being inherited.

What Can Increase the Risk?

Several environmental and occupational factors may contribute to lung cancer in non-smokers, including:

• Long-term exposure to air pollution, especially fine particulate matter (PM2.5)
• Indoor air pollution caused by biomass fuels used for cooking
• Exposure to asbestos, silica, or diesel exhaust in certain workplaces
• Long-term exposure to radon gas in some buildings

Although these factors do not guarantee that someone will develop lung cancer, they can increase the risk over time.

Early Symptoms Are Often Overlooked

Lung cancer does not always begin with a persistent cough. Some people may experience subtle symptoms that are easily mistaken for common illnesses, such as:

• Unexplained fatigue
• Shortness of breath that gradually worsens
• Persistent shoulder or chest pain
• Repeated lung infections or pneumonia
• Respiratory symptoms that keep returning despite treatment

Because these signs are often confused with allergies, infections, or ageing, diagnosis may be delayed.

Advances in Treatment

Treatment for lung cancer has improved significantly in recent years. Doctors now use molecular testing to identify specific genetic changes within the tumour. This allows eligible patients to receive targeted therapies or immunotherapy, offering a more personalised approach instead of relying solely on traditional chemotherapy.

Don’t Ignore Persistent Symptoms

One of the biggest misconceptions is that people who have never smoked are not at risk of lung cancer. Experts advise that any persistent or recurring respiratory symptoms should be properly evaluated, even in non-smokers. Early diagnosis remains one of the most important factors in improving treatment outcomes.

Disclaimer: This article is for informational purposes only and should not be considered medical advice. Always consult a qualified healthcare professional if you experience persistent respiratory symptoms or have concerns about your lung health.