Multiple solid nodules in both lungs, mostly asymptomatic, are in most cases a benign lesion of the lungs and are not dangerous enough to require regular hospital visits. However, special cases, such as lung metastases, are not excluded and are more dangerous, suggesting advanced tumor stage. The main causes of multiple solid nodules in both lungs are infection, tuberculosis, lung cancer, lung metastases and so on. 1. Infection: if it is bacterial infection caused by multiple solid nodules in both lungs, some more sensitive antibiotics should be chosen, such as cephalosporins or piperacillin antibiotics; if it is caused by mycoplasma infection, patients need to choose macrolide antibiotics, such as erythromycin and other drugs. 2. Tuberculosis: Tuberculosis infection caused by multiple solid nodules in both lungs, you can use some of the drugs used to treat tuberculosis, such as isoniazid. 3. Lung cancer: small nodules caused by lung cancer are usually treated with radiotherapy, surgery and other treatments, which have more obvious effects. 4. Lung metastases: commonly found in gastrointestinal tract, urinary system, breast and other tumor metastases, which need to treat the primary lesion, such as surgery, radiotherapy and chemotherapy. Multiple solid nodules in both lungs, it is recommended to go to regular hospitals for diagnosis and observation or treatment under doctor’s guidance.