Bacterial pleurisy refers to the inflammation of the pleura caused by bacterial infection, which will cause pleural edema, exudation and pleural effusion, resulting in a series of symptoms, mainly including chest pain, fever, cough and dyspnea. 1. Chest pain: pleurisy can cause pleural irritation, resulting in obvious chest pain and peripheral referred pain. 2. Fever: The presence of an infection can lead to the emergence of a pyrogen, which activates the leukocyte pyrogens and acts on the central thermoregulatory system, causing symptoms of fever. 3. Cough: pleural inflammation will cause airway irritation, resulting in coughing symptoms, partly accompanied by coughing up sputum. 4. Dyspnea: because of pleural effusion, limited lung activity, etc., will cause the manifestation of dyspnea. The emergence of bacterial pleurisy causes serious symptoms, the need for timely medical observation, after diagnosis of specific lesions, under the guidance of clinicians for standardized treatment.