The limited thickening of pleura belongs to the imaging manifestation, which may be related to pleurisy, pneumothorax, pneumonia, tuberculosis and other diseases. 1. Pleurisy: mainly due to bacteria, fungi, viruses and other pathogenic bacteria, resulting in inflammatory reaction caused by damage to the pleural area, in the process of repair may form granuloma proliferation, resulting in limited thickening of the pleura. 2. Pneumothorax: mainly caused by chest injury, basic lung diseases, pulmonary herpes, etc., due to the inflammation caused by the injury of the pleural area, limited thickening of the pleura will also occur in the process of repair. 3. Pneumonia: mainly caused by bacterial and viral infections, resulting in granulomatous tissue proliferation in the pleural area, and limited thickening of the pleura will occur. 4. Tuberculosis: mainly due to tuberculosis infection, low immunity, drug abuse, alcohol and so on can also induce the disease, resulting in granulation tissue proliferation in the pleural area, and the appearance of limited pleural thickening. Therefore, when limited pleural thickening occurs, you should actively cooperate with the doctor to improve the auxiliary examination, diagnose the condition and then early targeted treatment.