Clinical data on nodules on the lungs show that 20% have a probability of cancer, while about 80% are benign. The larger the nodule in the lung, the higher the likelihood of malignancy. This is especially true for people who have smoked for more than 20 years, are over 40 years old, and have a family history of tumors, accompanied by symptoms such as chest pain, cough, blood in sputum, and weight loss. Also, imaging data showing burr-like, lobulated or ground glass-like changes around the nodules should be alert to the possibility of cancerous nodules. Small nodules in the lungs are found clinically, and benign small nodules are far more common than cancerous small nodules. Therefore, it is important to pay attention to follow-up examinations at any time to detect the changes of the disease early and to treat them accordingly.