There are many types of arm dislocations in children, and different types can be reset in different ways. The most common type of dislocation in children is radial head subluxation, which can be reset directly without anesthesia. Radial head subluxation reset technique: one hand holds the child’s wrist, the other hand to support the elbow, with the thumb on the radial head area, forearm and upper arm (i.e., the elbow joint) at an angle of 90 °. The forearm as an axis, gently clockwise and counterclockwise to the appropriate amplitude of rotation, repeated several times, while using the thumb to gently push the radial head, when you hear a slight popping sound, the elbow joint activity is normal that is, reset successfully. For children’s arm dislocation, by professional doctors to determine the type of dislocation and then further treatment. When dislocated, should be immediately to the hospital to avoid forced violence activities after the injury aggravated.