The family is traveling together, the mother and father’s big hand holding the baby’s small hand, all the way laughter, the baby is also jumping all the way. Suddenly, the smile on the baby’s face suddenly fades, replaced by incessant crying, and careful parents will find that the baby’s side of the elbow can not move, and not allowed to touch. This is likely to be what we often refer to as stretched elbow. Pulled elbow is medically known as radial subluxation. Radial tuberosity subluxation occurs most often in young children under the age of 4. In early childhood, the radial head is not yet fully developed, the radial head and radial neck are basically the same diameter, and a structure called the annular ligament surrounding the radial head is relatively lax and does not provide real stability to the radial head. When the baby’s elbow joint is extended and rotated medially, and the wrist or forearm is suddenly pulled from the longitudinal direction, the radial head may dislocate downward from the annular ligament, which slips over the distal radial tuberosity and becomes lodged in the joint space, preventing the radial tuberosity from returning to its original position and eventually causing radial tuberosity subluxation. What are the signs of radial subluxation in babies? When a baby has a radial head subluxation, he or she will usually cry a lot and refuse to move or press on the dislocated arm. If you touch the lateral side of the radial head, the baby will cry more because there will be significant pressure and pain. If these conditions occur, it can be determined that the baby has drawn elbow. So what should we do when a baby has a pulled elbow? We recommend to try to visit the nearest hospital and seek help from a doctor. The common clinical method of resetting is simple and easy to use, and parents can help their babies reset when they first develop a pulled elbow. Take the right elbow joint as an example, when resetting, face the baby, lift and hold the baby’s forearm with the right hand, flex the elbow joint about 90°, drag the left palm on the inner side of the elbow, press the thumb on the position of the radial tuberosity and apply some pressure. The right hand suddenly rotates the baby’s forearm counterclockwise with force, and the thumb that is usually pressed on the radial tuberosity will have a distinct bouncing sensation, indicating that the radial tuberosity has been reset. The baby can then move freely and can flex and extend the elbow joint. If the repositioning is not successful, parents are not advised to reposition the baby again and are advised to go to the nearest hospital for treatment. After resetting, the upper limb can be suspended by a triangular scarf for 3-5 days to reduce the activity and prevent habitual dislocation. For habitual dislocations that recur frequently, parents should pay attention and make sure to avoid pulling the affected limb. For babies with more severe habitual dislocation, after the manual reset, upper limb plaster rests can be used to fix the elbow joint at 90° position and the forearm is stabilized for 7-10 days. Babies generally rarely develop a pulled elbow by the age of 5-6 years. Therefore, before the baby is 4 years old, when holding the baby’s hand and going out to play, or taking off the baby’s top, etc., you must avoid pulling the baby’s forearm too hard to prevent the occurrence of pulling elbow. If the baby is more active, you can choose to hold the baby’s waist and other parts of the baby, both to prevent the baby from falling, but also to effectively avoid the occurrence of pulling elbow. (This article is the author’s original, please specify the source.)