Patients with lung nodules are advised to stop smoking and are advised to quit smoking because most lung nodules are caused by chronic inflammation, which may be caused by long-term smoking. Although most of the lung nodules are benign nodules, they may also be malignant. Therefore, smoking is one of the high risk factors for lung cancer, and it is better to quit smoking. Lung nodules do not cause symptoms, especially nodules below 6mm in diameter are microscopic nodules of the lung and only need to be reviewed regularly. If you live in an environment where dust and haze are serious, or have occupational exposure with risk of exposure to dust, it is better to avoid or consciously wear a mask.