There are 2 types of bone dislocations: 1. Direct violence leads to fracture, which destroys the continuity of the bone and leads to significant displacement of the fracture end, and this type of patient will show severe pain at the fracture site, accompanied by very obvious pressure pain, and also abnormal activity, accompanied by obvious bone rubbing sensation when moving the affected side, and sometimes the sound of bone rubbing can be heard, also accompanied by the characteristic signs after the fracture, longitudinal 2. Dislocation of the joint, i.e., the loss of the original anatomical structure of the two bones that make up the joint, which is characterized by pain and swelling.