Lung nodules are nodules less than or equal to 3 centimeters, 27 centimeters lung nodules generally do not exist, should be 27 millimeters, can be caused by a variety of reasons, and its treatment should be based on the cause of the general drug therapy, radiotherapy or surgical treatment. 1. Tuberculosis: lung nodules caused by Mycobacterium tuberculosis infection should be treated with anti-tuberculosis drugs such as isoniazid and rifampicin following the principles of early, combined, moderate, regular, and full treatment. 2. Lung fungal infection: it can also lead to the appearance of lung nodules, which can be properly treated with antifungal drugs such as fluconazole and itraconazole. 3. Lung cancer: chemotherapeutic drugs such as cisplatin can be applied appropriately, or radiotherapy or surgery can be carried out. The cause of lung nodules should be clarified as early as possible, and the drugs should be used according to the doctor’s prescription so as to avoid delaying the treatment.