Multiple nodules in both lungs can be caused by chronic inflammation, infectious lesions in the lungs, malignant tumors, etc. Treatment should be targeted according to the nature of the nodules. 1. Chronic inflammation: Multiple nodules in both lungs may be caused by chronic inflammatory nodules resulting from previous infections, long-term exposure to dust or polluted air. This condition usually requires no special treatment, stay away from polluted environments, pay attention to warmth, and follow up regularly. 2. Infectious diseases of the lungs: Tuberculosis can be manifested as multiple nodules in the lungs and requires active anti-tuberculosis treatment, such as the use of rifampicin, isoniazid, pyrazinamide and other drugs. Fungal infections in the lungs can also lead to multiple nodules in the lungs, which can be treated with voriconazole, itraconazole, amphotericin B and other drugs. 3. Malignant tumors: For multiple nodules in both lungs caused by advanced lung cancer or metastasis of malignant tumors in other parts of the body, the prognosis is generally poor, and the tumor needs to be evaluated and then treated with surgery, chemotherapy or radiotherapy. Multiple nodules in both lungs can also be caused by other diseases, such as rheumatoid arthritis. It is recommended that the patient should consult the doctor in time and cooperate with the doctor for further examination to clarify the cause of the multiple nodules in both lungs, and follow the doctor’s instructions for active treatment or follow-up.