This change is usually caused by capillary bronchitis, inflammation and thickening of capillaries around the lung nodules, and also by fibrosis of the lung tissue around the lung nodules; in addition, long-term inflammation around the lung nodules leads to pleural pulling changes, which is medically called pleural pulling. In addition, long-term inflammation around pulmonary nodules leads to pleural pulling changes, which is medically called pleural pulling sign, and this kind of change can be seen through X-ray or CT examination. Some of the burrs, such as long burrs and fibrotic burrs around the nodes, are benign lesions.