The limited thickening of the right pleura is considered to be related to pleurisy, pneumonia, tuberculosis, pleural mesothelioma and so on. 1. Pleurisy: For patients who have suffered from pleurisy, limited thickening of the right pleura may be manifested due to inflammatory stimulation or scarring left after the disease is cured. Pleurisy can be caused by pathogenic bacterial infection, pleura itself, etc. Common symptoms include chest pain, chest tightness and dyspnea. 2. Pneumonia: Pneumonia is related to bacterial, viral and other pathogenic infections. When the inflammation is not controlled and further invades the pleura, it may manifest as limited thickening of the right pleura. Common symptoms include fever, cough and sputum. 3. Tuberculosis: For patients with tuberculosis, when Mycobacterium tuberculosis invades the pleura, it may also manifest as limited thickening of the right pleura. Common symptoms include coughing, coughing up sputum, hemoptysis, night sweating (abnormal sweating after going to sleep and stopping sweating after waking up), chest pain, and body weakness. 4. Pleural mesothelioma: part of pleural mesothelioma can be seen as limited thickening of right pleura on medical examination. The cause of pleural mesothelioma is still unclear, may be related to exposure to asbestos, radiation, etc. Common symptoms of patients include dyspnea, persistent severe cough, chest pain, fever, etc. It is recommended that patients with limited thickening of the right pleura should undergo further detailed examination in order to clarify the cause of the disease and then follow the doctor’s instructions for treatment.