This condition is called “radial tuberosity subluxation”, also known as “pulling elbow”. It can occur in children aged 2 to 5 years old, both on the left and right side, with a history of pulling the affected limb before the disease. After the injury, the child cries, the elbow joint is in a semi-flexed position, the forearm is passively rotated forward, refuses to move the affected limb, and refuses to raise his hands and hold things. This dislocation can be repositioned manually without anesthesia in the outpatient clinic. Sometimes the child is afraid to move even after being rubbed. There are three possible reasons for this: 1. Incomplete reset, most of the radial head subluxation has a slight popping sound when reset, and sometimes the doctor also feels a popping sound, but it may not be a reset popping sound or not completely reset. 2. 2.Redislocation, after reset, parents do not pay attention to the protection of the affected limb, and make it dislocate again due to pulling. 3.Long time of dislocation and local tissue swelling. In case of the above, the patient’s elbow can be reset again, or the patient’s elbow can be kept in a 90° flexion position and suspended for 2-3 days.