Congestion after fracture may be related to hemorrhage of fracture break end and local blood vessel rupture.
1. Bleeding at the broken end of the fracture: after the fracture caused by trauma, there will be internal bleeding at the broken end of the fracture due to the destruction of the bone quality, which is usually dominated by bleeding from the bone marrow cavity within the bone, followed by rupture and bleeding of the trophoblastic vessels within the bone, which will lead to congestion after the fracture. Severe hemorrhage of the fracture broken end will appear hemorrhagic shock. For example, hemorrhage after iliac fracture can cause hemorrhagic shock.
2. Local vascular rupture: part of the post-fracture congestion will be manifested as congestion of the subperiosteal or extraskeletal muscle and fascial layer. It is mainly due to the rupture and bleeding of periosteal blood vessels, capillaries running in the muscle or fascia layer in the fracture area, resulting in local congestion. Localized swelling or localized ecchymosis will form after congestion.
Severe post-fracture congestion requires hospitalization for surgery.