Pulmonary texture gain usually refers to the phenomenon of increased linear high-density shadowing from the hilum to the periphery on chest CT or chest radiographs. For this phenomenon, it can be seen in many clinical situations, as follows: 1. Bronchitis: The main components of lung texture are bronchial vessels and surrounding connective tissue. 2. Carcinomatous lymphangitis: If it mainly involves the medial interstitium, it can also lead to increased lung texture. 3. Interstitial pulmonary edema: It can also cause Lung texture weight gain. Sometimes a healthy person taking a chest X-ray may also report pulmonary texture weight gain, so the phenomenon of pulmonary texture weight gain should be combined with the features of chest X-ray and chest CT as well as the patient’s specific medical history for a comprehensive analysis.