A smaller lung nodule at least indicates that the nodule is initially judged to be an inflammatory nodule, because clinical lung nodules are divided into three conditions: ground glass nodules, partially solid nodules and solid nodules. Most of the ground glass nodules and solid nodules are inflammatory, and after antibiotic treatment, the inflammation can be absorbed, or even completely absorbed and disappeared, so the inflammatory nodules can easily become smaller. Some solid nodules may remain unchanged despite various treatments, or even develop into growing nodules, which are more malignant and prone to carcinogenesis. Clinically, smaller lung nodules indicate a good thing, at least the inflammatory component is huge, and after antibiotics and comprehensive treatment can significantly reduce the diameter and extent of the nodules, and imaging suggests that the nodules become smaller. However, the nodule should not be taken lightly and still requires dynamic annual follow-up chest imaging to see if the nodule is changing dynamically.