Elderly people with nodules in the lungs should be treated according to different etiologic factors, generally using antibiotic treatment, anti-tuberculosis treatment, and observation and follow-up. 1. The most common cause of lung nodules in the elderly is due to infectious factors, such as Streptococcus pneumoniae and Pseudomonas aeruginosa, etc. After entering the lungs, the germs will form foci in the lungs, which will be infiltrated by localized inflammatory cells, and will also cause localized microcalcifications or granulomas, thus giving rise to the nodular shadows in the lungs. The treatment of this condition can be directed at the infection treatment, clinically commonly used cefuroxime, azithromycin and other antibiotics. 2. A small number of tuberculosis-induced nodules in the lungs are treated with anti-tuberculosis therapy, which is usually isoniazid, rifampicin, pyrazinamide and other drugs. 3. Very few lung nodules are tumors, and benign tumors are common, according to whether the tumor has compression symptoms or whether the tumor has malignant tendency for the next diagnosis and treatment, generally need long-term observation and follow-up. Clinically, lung nodules may also have other diseases, such as autoimmune pulmonary nodular disease, malignant tumors, etc., and should be promptly consulted, the cause of the disease should be clarified, and the treatment should be targeted.