Hematoma mechanization is the incomplete absorption of hematoma formed after bleeding in local tissues or body cavities, which may form blood clots containing reticulated fibrin or fibrous tissue encapsulation. Hematoma generally refers to the occurrence of internal hemorrhage in human tissues under the action of various factors, and limited massive bleeding in the tissues is called hematoma, such as subdural hematoma, subcutaneous hematoma, and retroperitoneal hematoma. After the occurrence of limited hemorrhage, platelet aggregation and the coagulation process in the body will carry out hemostasis. The organism will absorb the hematoma that has been formed, and some of the larger hematomas can, during the absorption process, form a clot containing reticulated fibrin, and fibroblasts and phagocytes invade the clot, i.e., the mechanization of the hematoma. On the other hand, when a fracture occurs, the ends of the fracture will bleed profusely and form a hematoma, which belongs to the hematoma mechanization phase, also known as the fibrous healing phase, which is the first stage of fracture healing. When hematoma mechanization occurs, it is recommended to seek medical treatment in time and standardize the treatment under the guidance of professional doctors.