Whether the multiple nodules found in both lungs are serious needs to be judged according to whether the patient’s nodules are benign or malignant; benign nodules are usually not serious, but malignant nodules are more serious. If the multiple nodules found in both lungs are caused by viruses, bacteria, fungi and other causes of pneumonia, or tuberculosis caused by Mycobacterium tuberculosis, or misshapen tumors, the nodules caused by these diseases are usually not serious, and the prognosis is better after professional treatment. If the multiple nodules found in both lungs are caused by metastasis of other malignant tumors, or primary lung cancer or pneumoconiosis, the nodules in this case are more serious and need timely treatment, such as surgical treatment, radiotherapy, chemotherapy, and targeted therapy. Patients with multiple nodules found in both lungs should further improve the relevant examinations under the guidance of the doctor to clarify the cause of the disease and carry out treatment after a clear diagnosis.