Adhesion thickening in the lung adjacent to the pleura may be caused by tuberculosis, pleurisy, chest injury and other factors. 1. Tuberculosis: Tuberculosis is caused by chronic inflammation stimulated by Mycobacterium tuberculosis infection. After Mycobacterium tuberculosis infects human lungs, symptoms such as thickening of adhesions near the pleura of the lungs, friction of the pleura, and fullness of the chest wall will appear. 2. Pleurisy: pleurisy is an inflammation of the viscera and wall layers in the pleural cavity, which can be directly transmitted from the chest organs, so pleurisy may lead to adhesion and thickening of the pleura near the lungs. 3. Chest injury: when the patient’s chest injury is severe, there is often fluid in the pleural cavity, and if the fluid stays in the pleural cavity for too long, it will irritate the pleura, which may also lead to adhesion and thickening of the lung adjacent to the pleura. When the adhesion and thickening of the lungs near the pleura, it is recommended to go to the hospital as soon as possible for examination, to identify the cause of the disease and then give timely treatment to avoid delaying the disease.