Small nodules in both lungs are an imaging manifestation, most often seen in chest CT, radiograph, and MRI reports. Small focal, round or round-like dense shadows in the lungs that are less than 1 cm in diameter are called pulmonary nodules. The presence of these nodules in both the left and right lungs requires a comprehensive judgment based on the size, number, and degree of benignity and malignancy of the nodules, and cannot be judged as serious by the results of the imaging report of small nodules in both lungs. Most of these nodules are caused by infections such as viruses, bacteria, bacterium, chlamydia, etc., fibrosis and calcification of the lungs, certain special jobs, such as pneumoconiosis, and bad habits in life, such as smoking, can lead to small nodules in both lungs, which require targeted treatment for the cause, such as antibiotics for infection, and smoking, which should be stopped immediately. The imaging manifestation of nodules may be accompanied by irritating cough, blood in sputum and other manifestations. If surgery is performed at an early stage and radiotherapy is given afterwards, the survival rate can be high to a large extent. If the disease has progressed to an advanced stage and extra-pulmonary metastases appear, the disease is more serious at this time and the prognosis is relatively poor.