Bangalore, Karnataka, 1st August, 2026 : The lung cancer and smoking has existed for an extensive period, but in recent years, growing numbers of lung cancer patients are non-smokers. This change in trend means that there should be a greater emphasis on informing people that lung cancer is not exclusively a disease of smokers.
About 10-20% of lung cancer cases are believed to affect people who have never smoked. If the lung cancer in non-smokers is treated as an independent entity, it would be one of the leading causes of cancer deaths worldwide. This group of patients consists of mainly women and other young patients.
Many factors which contribute to the development of lung cancer in non-smokers exist. One of such factors is the long exposure to second-hand smoke known to contain the same cancer-causing substances as tobacco smoke. Also, poor air quality is becoming one of the main factors which affect non-smokers.
One of the major risk factors is exposure to second-hand smoke. This type of smoke is known to contain many of the same substances associated with cancer found in tobacco smoke. Air pollution is another contributing factor, particularly fine particulate matter, since people living in cities where air quality is poor can experience long-term effects from this type of pollution that may even hurt their lungs.
Indoor air pollution is another relevant issue often left unaddressed when it comes to lung cancer. Radon gas exposure is a cause of lung cancer and it happens indoors because it is a naturally occurring gas that can build-up in non-well-ventilated areas. Another factor that may increase risks of lung cancer is occupational exposure to dangerous substances such as asbestos, silica, diesel exhaust, arsenic, and other industrial chemicals.
Family history and genetic changes also play a role. Some of the genetic changes that can help explain why some non-smokers develop lung cancer include EGFR mutations which are more common in non-smokers suffering from lung cancer in particular from the Asian population.
One of the major difficulties is that the presence of early-stage lung cancer is usually without any signs. If there are signs, they may consist of such manifestations as chronic cough lasting over three weeks, presence of blood in one’s sputum, pain in one’s chest, loss of weight for unknown reasons, breathing problems, constant tiredness and frequent attacks of pneumonia. What is more regrettable is that signs can be confused with the presence of some common respiratory diseases which slows down the process of diagnosis.
The efficiency of early detection cannot be disputed as well. People who have serious factors of risk, including long-term exposure to passive smoking, the risk of meeting dangerous industrial elements, or strong family history of lung cancer, should consult their doctors who will inform them about their risk.
Preventing lung cancer means more than just avoiding smoking. Reducing one’s risk means less exposure to pollutants, achieving proper indoor ventilation, observing occupational safety measures and seeking a medical opinion about constant respiratory symptoms. Lung cancer is an evolving disease, and understanding it is a must for everyone.
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