Nodules in the lungs need to be reviewed every year, even if there is no change after two years of review, you still need to continue to go for review in the future. Because this nodule in the lungs is actually a proliferator, and the lungs are directly to the outside atmosphere, anything in the air inhaled into the lungs is actually a stimulus to the nodule, not only the haze, other paints, cosmetics, and decorative odors, in fact, the nodule in the lungs are a stimulus. Therefore, once the nodules are found in the lungs, it is recommended to have an annual physical examination, and must keep an eye on the nodules to make sure that there will be no further development, because once there is further development, it is necessary to consider that there may be malignant changes, because the nodules are a punctate hyperplasia, and if they are stimulated to develop further, they are often prone to become malignant tumors. Although the percentage is not very large, it is still important to pay attention and be careful.