Slightly thickened bilateral pleura limitation refers to the thickening and hypertrophy of bilateral pleural structures detected by imaging such as lung CT, which is often caused by pleural inflammation, tuberculosis, tumors, and so on. Pleura is a two-layer mucous membrane structure on the outside of the lungs, which is thin, one layer is close to the surface of the lungs called the dirty pleura, and one layer is lined with the inner surface of the chest wall called the wall pleura, and the two layers of pleura are connected to each other at the bottom of the thoracic cavity to form an airtight cavity, i.e. the pleural cavity. Tuberculosis, pneumothorax, pleurisy, and trauma to the chest wall may cause pleural injury and localized inflammatory exudate, which is slowly absorbed. The exudate contains a large amount of fibrin, which constantly deposits to appear adhesions, which are gradually repaired by granulation tissue to form a localized scar, resulting in a limited and slightly thickened pleura bilaterally. In addition, primary pleural tumors and metastatic tumors can also thicken the pleura. Therefore, according to the specific causes of pleural thickening, the treatment means are also different: pleural thickening caused by trauma or inflammation does not need special treatment, regular observation and follow-up; tuberculous pleurisy or acute pleurisy needs to be treated with isoniazid, rifampicin anti-tuberculosis or antibiotics such as amoxicillin as prescribed by the doctor; in case of neoplastic disease, surgery combined with radiotherapy is needed. When bilateral pleural thickening is limited, it is recommended that the patient consult a doctor in time, according to the specific symptoms and other auxiliary examinations to clarify the cause of the disease, and active treatment.