The seriousness of multiple solid nodules in both lungs cannot be generalized, but should be determined by the nature of the nodules and the patient’s symptoms. If the nodules are caused by pneumonia or tuberculosis, they are mostly benign, and the patients may have fever, cough, sputum and other clinical manifestations, so there is no need to worry too much, and they can actively consult doctors for anti-inflammatory and anti-tuberculosis treatments under the guidance of doctors. If it is metastatic cancer causing multiple solid microscopic nodules in both lungs, such nodules are malignant, and besides coughing and sputum, patients may also have clinical manifestations such as pleural effusion, hemoptysis, hemopneumothorax, etc., which will affect the normal respiratory and even circulatory functions, and the situation is more serious, and it is necessary to choose whether to carry out surgical treatment, as well as chemotherapy, radiotherapy and other treatments under doctor’s supervision. When multiple solid nodules are found in both lungs, it is necessary to actively consult a doctor to clarify the cause of the disease and treat the cause to prevent delays.