Pig lung belongs to animal offal and may contain lymph nodes or unhygienic things, but it is not the case that eating pig lung will lead to cancer, there is no exact link between the two, and there is a possibility that it may cause other problems such as indigestion or elevated blood fat. Cancer is the result of a more complex and comprehensive role, may be related to dietary factors, environmental factors, heredity and genetic mutations, and is not caused by any one of these factors, such as long-term alcohol abuse, staying up late, eating smoked barbecue or animal offal, which is not good for health, and in the long term may lead to a higher risk of cancer. However, it is not the case that eating pig lungs once or often will lead to cancer, and there is no definitive medical research on this. Of course it is better to pay attention to a healthy diet, eat more fresh vegetables and fruits, and eat less and more meals.