If there are still nodules after lung nodule surgery, it may be chronic inflammation or tumor. 1. Chronic inflammation: Inflammation caused by bacteria, viruses, etc. will cause damage to the lungs, and when the inflammation heals, scar tissue will be formed, which will manifest as solid nodules. Bacterial culture and drug sensitivity test should be carried out, and appropriate antibiotics or antiviral drugs should be used for symptomatic treatment. Usually, the prognosis is better, and although there are nodules, they will not affect the patients too much. 2. Tumor disease: Lung cancer or cancer from other parts of the body metastasized to the lungs, usually manifested as ground-glass nodules. When the nodules are removed, smaller cancer foci in the primary site may not be completely removed or cancer foci in other parts of the body metastasized to the lungs again, which may lead to reoccurrence of the nodules after the operation. Follow-up should be adhered to with radiotherapy or targeted therapy. It should be noted that when there are still nodules after lung nodule surgery, one should visit the hospital in time for examination and treatment under the guidance of the doctor.