Generally pleural thickening does not heal on its own, but because most patients have mild symptoms, no specific treatment is required. A small number of patients with significant effects on pulmonary respiratory function require surgical treatment. Pleural thickening is the phenomenon of increased pleural thickness due to fibrosis caused by fibrin deposition and granulation tissue proliferation after stimulation of the pleura, and can be both limited and extensive. The most common causes are pneumothorax, trauma, tuberculous pleurisy and septic pleurisy. The most common causes include pneumothorax, trauma, tuberculosis pleurisy and purulent pleurisy. When the symptoms of pleural thickening are mild, the symptoms such as chest tightness caused will gradually reduce or disappear with the body compensating. Patients can strengthen their exercise routine by performing appropriate chest expansion exercises and deep breathing. If pleural thickening affects the respiratory function of the lungs, it can also be treated by pleurodesis.