Pulmonary nodules are classified into three conditions: ground glass nodules, partially solid nodules and solid nodules. If the faint nodules disappear after treatment, it indicates inflammatory changes, and there is no need to be nervous. If the faint nodular shadow increases in size or even becomes partially solid nodules with prolonged follow-up, especially if the faint nodules are larger than 6-8 mm, it is necessary to be highly alert to the occurrence of lung cancer. Clinically, enhanced CT of the chest, percutaneous lung aspiration for cytological examination and, if necessary, surgical excision treatment by a thoracic surgeon are needed to further clarify whether the nodule is carcinogenic. In conclusion, faint nodules in the lung are mostly inflammatory changes and need to be followed up dynamically for its size and nature for further targeted treatment.