The reason for swelling after fracture surgery is mainly caused by soft tissue damage at the fracture break. When a fracture is created, the fracture can have some impact on the local soft tissues, which can cause significant damage to the soft tissues around the fractured broken end. In addition, the violence that caused the fracture can also directly cause significant damage to the soft tissues at the broken end, so that swelling will be evident after the fracture. After fracture surgery, the damaged soft tissues are not fully recovered, and further damage to the soft tissues around the fractured broken end will occur during the surgery, so it will lead to further edema of the broken end and eventually to significant swelling.