Dislocation of the arm in children is characterized by symptoms such as pain in the dislocated joint, limitation of movement, and joint deformity. If the child’s arm dislocation is a large joint dislocation, such as the shoulder joint, elbow joint, etc., after the dislocation, there will be severe pain, joint activity is limited, can not do flexion and extension and other sports. Dislocated joints have obvious deformities, such as dislocated shoulder joints can be palpable obvious depression, square shoulder deformity, dislocated elbow joints after the ulna hawksbill can have obvious protrusion. If it is a small joint dislocation, such as radial tuberosity subluxation, in addition to pain, activity is limited, most of the joint deformity is not obvious. If the symptoms of dislocation of the child’s arm, it is recommended that the patient go to the hospital for medical examination, complete the examination and receive regular treatment.