Pleural depression must involve the pleura. Pleural depression may be caused by lung nodules or lung inflammation, etc. The pleura is invaginated and wrinkled, like a trumpet-like depression in the lung. It is recommended that the patient improve the relevant examination to clarify the cause of the disease. Pleural depression is usually an imaging manifestation in CT examination, which represents the presence of disease in the pleura. It may be related to lung nodules, lung inflammation, tuberculosis, fungal infection in the lungs and other diseases, which cause the pleura to sink and crumple like a trumpet-like depression in the lungs, i.e. pleural depression. It may cause symptoms such as cough and dyspnea in patients. It is recommended that the patient go to the hospital in time to improve the ultrasound examination, magnetic resonance imaging, pathological puncture examination, sputum smear examination, tumor markers, tuberculin test and other examinations, to clarify the cause of the disease and treat the cause.