Hip pain in children may be related to trauma, synovitis of the hip joint, joint dysplasia and other factors. 1. Trauma: Children with recent trauma or sprains may have pain on one side of the hip, which will slowly improve after proper rest. 2. Synovitis of the hip joint: synovitis of the hip joint may be related to over fatigue, excessive immune response and other stimuli, all of the above conditions may lead to aseptic inflammation in children’s bodies, in addition to bacterial and viral infections can also lead to the appearance of the above symptoms. 3. Joint dysplasia: Joint dysplasia may cause the above symptoms in children, and may be accompanied by persistent limping and difficulty in walking. There may be other reasons for children’s hip bone pain, it is recommended to go to the hospital in time for relevant examinations, to clarify the cause of the disease, and then actively treat the symptoms.