Smoking and Lung Cancer: Crucial Facts to Know Intro: Mr. Feng, a 65-year-old man with a long history of smoking, ignored the advice to quit due to his family's healthy smoking experience. However, after experiencing leg pain, he was diagnosed with advanced-stage lung cancer with bone metastasis.

1. Smoking and Lung Cancer: The latest data shows that lung cancer is the most common cancer in China, with about 85% of cases linked to smoking.

China has a high number of smokers and over a million deaths annually due to smoking-related causes.

2. Signs of Lung Cancer in the Legs: Besides common symptoms like cough and chest pain, lung cancer may also present with leg abnormalities. These include skin inflammations, intermittent leg pain that worsens over time, and continuous leg swelling due to lymph node involvement.

3. Non-Smokers and Lung Cancer: While most lung cancer cases are associated with smoking, non-smokers can also develop the disease. Factors like passive smoking, exposure to pollutants, and genetic susceptibility contribute to lung cancer risk.

Conclusion: To prevent lung cancer, proactive measures like regular screenings and early detection are crucial, especially for high-risk individuals. Paying attention to unusual swelling or changes in any part of the body is essential for timely diagnosis and treatment.