A young mother and father are playing a game with their baby’s hand when suddenly the baby cries and can’t lift one arm, the elbow joint won’t move, the forearm won’t rotate, and the young mother and father are at a loss: what’s wrong with the child? The above scenario is often seen in our daily lives, and some people who think they have experience will tell the parents that the child’s arm is “dislocated”. After a detailed examination, a more professional pediatric orthopedic surgeon will tell the baby’s parents: this is called radial head subluxation, also known as “pulling elbow”, this dislocation is common in children under 5 years old, the radial head is not fully developed in children under 5 years old, the annular ligament is relatively loose, under external traction, the radial head will be dislodged from the annular ligament, forming a subluxation, annular ligament. When the annular ligament is stuck in the humeral radial joint gap, the child’s elbow joint cannot move and is painful. Zhengzhou Orthopaedic Hospital pediatric orthopaedic specialist Dr. Song Xiangjian pointed out that, in daily life, where the child has pain and crying after the arm is pulled, parents should not be anxious, timely find a professional pediatric orthopaedic surgeon on the line.