Lung nodules change from more than 2 mm to more than 3 mm, indicating that the lung nodules are enlarged, and what should be done needs to be analyzed in combination with the time between the 2 examinations and the patient’s symptoms and signs. If the interval between two examinations is long, more than 1 year, and there is no discomfort, it is recommended to review regularly, without too much tension. If the interval between the 2 examinations is shorter, or there are chest pain, cough, fever and other symptoms, need to pay attention to, and promptly go to the hospital. Improve the relevant examination, lung nodules may be caused by pneumonia, tuberculosis or tumors, and need symptomatic treatment. 1. Pneumonia: you can choose antibiotics for anti-infection treatment, such as amoxicillin capsules, but need to be used under the guidance of a doctor. 2. Tuberculosis: patients need full, standardized, appropriate amount, regular, joint anti-tuberculosis treatment, commonly used drugs are rifampicin, isoniazid, pyrazinamide, ethambutol, streptomycin and so on. 3. Tumor: It is necessary to clarify the nature of the tumor, if it is benign tumor, it can be temporarily observed and regularly rechecked; if it is malignant tumor, it is recommended to have early surgical treatment. Therefore, patients should pay attention to the fact that if they have any discomfort, they should go to the hospital in time for examination and actively cooperate with the doctor for treatment, and should not be careless so as not to delay the treatment.