Pulmonary fibrosis refers to localized pulmonary fibrosis lesions, which have no significant impact on the life expectancy of the patient. However, this localized pulmonary fibrosis lesion is more prone to lung infections than normal patients due to changes in the lung structure, which can easily be combined with Pseudomonas aeruginosa infections, requiring that antibiotics be selected with Pseudomonas aeruginosa in mind. In case of diffuse pulmonary fibrosis, it may affect the life expectancy of the patient, for example, the most common idiopathic interstitial pulmonary fibrosis is a type of diffuse pulmonary fibrosis, and patients with idiopathic pulmonary fibrosis have a significant impact on the life expectancy of the patient.