A small amount of fluid in the ground glass nodule of the lung may be caused by tuberculosis, pneumonia, lung cancer and other diseases, need to actively treat the primary disease, if the pleural effusion is large amount of feasible thoracentesis extraction. General treatment, drug treatment and surgery can be chosen according to different causes. 1. Tuberculosis: the use of anti-tuberculosis drugs such as isoniazid, rifampicin, pyrazinamide, streptomycin, etc., should be under the guidance of a doctor, early, regular, the whole process, the right amount of drugs, combined drugs. For people with serious symptoms of tuberculosis toxicity, glucocorticoids can be used. 2. Pneumonia: different pathogens should be treated with corresponding medication programs. For pneumonia caused by bacterial infection, ceftriaxone and other medications can be used. 3. Lung cancer: for early stage lung cancer without metastasis, radical surgery can be performed. For patients with advanced or recurrent lung cancer, chemotherapy and targeted therapy can be adopted. Common chemotherapy drugs include cisplatin and paclitaxel. Common targeted therapy drugs include gefitinib and so on. For patients with ground-glass nodules in the lungs and a small amount of pleural effusion, they should go to the hospital in time to clarify the cause of the disease and follow the doctor’s instructions for treatment.