6mm Lung nodules are generally not serious, and treatment is based on follow-up observation and medication if necessary. Suspected malignant nodules are treated with surgery. Lung nodule is a small swelling found in the lung imaging examination, the density is higher than the lung tissue, the shape is different, the edge can be clear or fuzzy, the general diameter is not more than 3cm, 6mm belongs to the small nodule. Clinically, most of the lung nodules are benign nodules, mostly caused by lung infections, such as pneumonia, tuberculosis and so on. Very few are malignant nodules, such as the appearance of burr, lobulation, pleural depression sign, vacuolar vascular sign and so on. Lung nodule 6mm without obvious symptoms, can be followed up regularly, short-term enlargement or symptoms, timely surgical treatment. Lung nodule 6mm with cough, sputum, low fever, such as tuberculosis mycobacterium infection, can receive regular anti-tuberculosis treatment, such as the use of streptomycin, ethambutol, etc., the use of drugs follow the doctor’s instructions. If the lung nodule is malignant, surgery should be performed as soon as possible, and the biopsy results should be combined to determine the follow-up treatment, such as regular follow-up, radiotherapy and chemotherapy. For 6mm lung nodules, patients are advised to seek medical advice as soon as possible and follow the advice of specialized doctors.