Pain is the most common symptom of joint dislocation and is caused by damage to the soft tissues surrounding the joint during dislocation. Second, swelling. Swelling is caused by damage to the soft tissues around the joint or bleeding during the dislocation, resulting in swelling around the joint. Third, deformity, deformity is caused by mutual misalignment of the joint during dislocation, which can have elastic fixation, the joint is fixed in one position and cannot be moved. Fourth, joint movement is limited, because the joint dislocation occurs with obvious pain and elastic fixation, which leads to joint immobility, often fixed in one position and not able to move. Most joint dislocations can be restored to their normal position after resetting.