Green sputum combined with pulmonary nodules may be caused by tuberculosis, Pseudomonas aeruginosa infection, lung cancer, etc. 1. Tuberculosis is the most common cause of the disease, because tuberculosis can form cavities in the lungs, and the cavities can lead to pus, which can lead to the symptoms of green sputum combined with pulmonary nodules. 2. Pseudomonas aeruginosa infection is a special type of infection, which can cause green sputum after infection. If the infection is not controlled in time, it can also cause pulmonary nodules, so it is also one of the possible diseases. 3. Lung cancer can also cause green sputum combined with lung nodules, which can cause recurrent infections and suppuration if the sputum cannot be completely discharged. The specific cause of the disease should be clarified after medical examination, and treatment should be carried out according to the doctor’s prescription.