The treatment of lung nodules needs to be based on the nature, size, shape and location of the nodule itself, which is categorized into the following situations: 1. Tiny nodules, with very small lesions, are recommended to be left untreated, and only need to be dynamically followed up and observed, with CT every 3 months, for 1-2 years. If there is no change in the lesion, it is considered benign and no treatment is needed; 2. If it is progressively enlarged, it needs to be hospitalized for further examination. If the nodule is relatively large, it can be judged by invasive examination, mainly through bronchoscopy, through the nasal cavity directly into the trachea, to watch the entire lumen in the trachea whether the lumen is open, whether there is tumor growth, or whether there are other mucosal changes. Percutaneous lung puncture, in which a small amount of tissue is removed from the interior of the nodule with a syringe or needle, can also be used to determine the benign or malignant nature of the nodule. The more advanced PET-CT can also be used, which is a whole-body scan and has a higher accuracy rate in non-invasive tests. Many invasive tests cannot confirm the diagnosis and can be used to determine whether the nodule is benign or malignant, and to decide whether or not surgical treatment can be performed.