Whether an isolated solitary pulmonary nodule requires treatment should be decided based on a detailed analysis of the size, shape, location, and degree of solidity of the nodule.
Lung nodules are categorized as non-solid, ground glass density, or solid nodules. In the case of sub-solid nodules mixed with ground-glass nodules, the more solid the nodule is, the more likely it is to be malignant. The smaller the diameter of the nodule, the more regular the shape, and the clearer the border, the more likely the nodule is benign.
Generally speaking, if the diameter of the nodule is less than 4mm and there is no obvious clinical symptom, you can choose conservative treatment first and go to the hospital for regular checkups. If symptoms such as coughing and dyspnea occur, you can go to the hospital for further examination to determine the benign or malignant nature of the nodule and then treat accordingly.