Pleural thickening may present with symptoms such as chest tightness, hypoxia, shallow rapid breathing, dyspnea, and cyanosis. If the pleural thickening is localized simple pleural thickening can have no obvious symptoms, but most pleural thickening, which occurs on the basis of pleural lesions, such as tuberculous pleuritis, traumatic hemothorax, chronic purulent pleuritis, pneumothorax, etc., can be secondary to pleural thickening symptoms. In particular, extensive pleural thickening of the dirty layer can lead to a narrowing of the thorax, making the intercostal space narrow, which can cause patients to experience respiratory restriction symptoms such as dyspnea, dyspnea, or shallow tachypnea, and can be accompanied by a variety of clinical manifestations such as hypoxia, cyanosis, and chest tightness. It is recommended that patients with pleural thickening should follow the physician’s advice, according to the preliminary examination results, improve the relevant examination, confirm the specific causes of pleural thickening, and give targeted treatment.