Elderly people presenting with ground glass nodules in the lungs are treated according to the cause. Ground-glass nodules in the elderly may be caused by lung infection, tuberculosis, lung cancer and other diseases. 1. Lung infection: clinical symptoms such as coughing up sputum, fever and cough. CT reveals ground-glass nodules, high leukocytes and elevated C-reactive protein. Need to use levofloxacin, cefmetazole, ceftriaxone and other antibiotic treatment. 2. Tuberculosis: manifested by low fever, night sweats, cough, hemoptysis, etc. CT often shows cavities, calcified foci, or only ground-glass nodules, and it should be treated with anti-tuberculosis drugs, such as isoniazid, rifampicin, streptomycin and pyrazinamide. 3. Lung cancer: mostly seen in middle-aged and old people with smoking history, manifested by chest pain, emaciation, cough, hemoptysis, etc. It is necessary to improve the examination of bronchoscopy, five items of lung cancer, chest CT, etc., and if necessary, carry out lung puncture and sputum cytology to make a clear diagnosis, and the treatment of first choice is surgery, and the treatment of first choice is radiotherapy if it is non-small-cell lung cancer. If old people have ground-glass nodules in the lungs, they should not use medication by themselves and need to seek medical treatment to avoid delaying the condition.