Small nodules in the lungs are no longer visible and do not require treatment if they are benign and malignant nodules require treatment. 1. Benign pulmonary nodules: These are solid, rounded nodules with clear borders on chest CT. If the nodules are small and there are no clinical symptoms or other medical history, they usually do not need special treatment and should be closely followed up by CT. 2. Malignant pulmonary nodules: bronchographic signs, vacuoles, burrs, etc. on chest CT, patients may have cough, chest pain, fever and other symptoms. Malignant nodules require biopsy for definitive diagnosis and screening of patients for risk factors such as a history of long-term smoking, chronic obstructive pulmonary disease (COPD), etc. Patients should be treated aggressively and surgically resected if necessary. Small nodules in the lungs should be treated promptly to identify the cause and standardize treatment under the guidance of a doctor.