Tiny solid nodules of 2mm in the lungs need to be followed up at intervals that can be chosen in relation to the physical condition. Lung nodules are solid or sub-solid lesions with clear borders, surrounded by air-containing lung tissue, and less than or equal to three centimeters in diameter on chest imaging. They are not associated with hilar enlargement, pleural effusion or lymph node enlargement. Lung nodules can be caused by a variety of reasons, such as chronic inflammation, fungal infections of the lungs, Mycobacterium tuberculosis, etc., but most of them are benign. 2mm tiny solid nodules in the lungs belong to tiny nodules, the diameter of lung nodules is relatively small, the possibility of benign is relatively high, but there is also a certain chance of malignant changes. In the early stage of the disease, it can be reviewed at intervals of 6 to 12 months, and in the later stage, it can be reviewed at intervals of 3 to 4 years or longer in conjunction with the physical condition.