While smoking is the leading cause, non-smokers can develop lung cancer too. Learn about secondhand smoke, air pollution, and other risk factors.
When most people think of lung cancer, one word comes to mind: smoking. And while it’s true that smoking is the leading cause of lung cancer, it’s not the only one. In fact, as many as 1 in 5 people diagnosed with lung cancer are non-smokers.
This can be a shocking reality, especially for those who live healthy lifestyles or have never touched a cigarette. But lung cancer in non-smokers is very real, and understanding the other risk factors can empower you to take proactive steps to protect your health.
Here’s what to know — and what to watch for — even if you’ve never smoked a day in your life.
🌫️ Secondhand Smoke Still Poses a Serious Risk
Just being around cigarette smoke at home, work, or in public spaces can increase your risk of developing lung cancer. Long-term exposure to secondhand smoke damages lung tissue over time, often without obvious symptoms.
👀 What to watch for: Chronic coughing, wheezing, or shortness of breath in people regularly exposed to household or workplace smoke.
💡 Pro tip: Reduce your exposure by creating smoke-free environments at home and in vehicles, and by avoiding places where others smoke regularly.
🏭 Air Pollution and Indoor Toxins Matter More Than You Think
Urban smog, diesel exhaust, and indoor air pollution from burning wood or cooking with poor ventilation can increase lung cancer risk.
💬 Sound familiar? You live in a busy area, cook with gas indoors, or haven’t had your home tested for radon.
💡 Pro tip: Use exhaust fans when cooking, keep air filters clean, and consider a radon test kit if you’re concerned about indoor air quality.
🧬 Genetics and Family History Play a Role
Some people are more genetically susceptible to lung cancer even without smoking or pollution exposure. If a close family member has had lung cancer, your risk may be higher than average.
👀 What to watch for: A family history of lung cancer or other types of cancer before the age of 60.
💡 Pro tip: Let your healthcare provider know your full family history. It may influence your screening schedule or prompt earlier testing.
🧫 Infections, Inflammation, and Occupational Hazards
Certain viral infections (like HPV), chronic lung inflammation, or repeated exposure to workplace toxins like asbestos or diesel fumes can increase risk, especially in industries like construction, shipping, or manufacturing.
💬 Sound familiar? You’ve worked in environments with chemical exposure or regularly deal with dust, fumes, or particulates.
💡 Pro tip: Always wear protective equipment and schedule regular health checkups if you’re in a high-risk occupation.
🔬 Early Detection Saves Lives — Even in Non-Smokers
Because non-smokers don’t often see themselves as at risk, lung cancer can go undiagnosed until it’s advanced. That’s why awareness and early attention to symptoms matter.
👀 What to watch for: Persistent cough, unexplained weight loss, chest pain, or fatigue—especially if you have any of the above risk factors.
💡 Pro tip: Don’t wait to bring up symptoms. A simple imaging test could lead to life-saving early detection
You Don’t Have to Be a Smoker to Be at Risk
Lung cancer isn’t just a smoker’s disease. Genetics, environment, and occupational exposure can all contribute, often silently. Knowing your risk is the first step toward protecting your health.
We offer lung screenings, referrals for imaging, and full-spectrum care for patients at every risk level. If you’re concerned about your risk — even as a non-smoker — we’re here to help.
📞 Call (242) 702-9310 to schedule a lung health evaluation with one of our Family Physicians.