On October 8, the first time the disease, Huangshi hospital failed to diagnose, but only oral antibiotics for 2 days. 19 again relapsed, Wuhan Children’s Hospital checked for left hip synovitis, one leg long and one leg short, recommended hospitalization. After returning to Huangshi, the hospital in Huangshi only let us take three days of penicillin and three days of oral cephalosporin, and then went to Wuhan Children’s Hospital on November 3 for a review, and the results said that the inflammation was still there and that we should rest in bed and not run and jump for six months. Then a short leg and a long leg still existed, and after asking about it, he said it was fine and that it was normal within 3 centimeters, but I was still not sure. I’ve had x-rays and three ultrasounds that show the hip joint is normal, but the child sometimes walks with a cramp. I’d like to ask why the child’s leg is short and long when there is no trauma and no congenital disease, and whether it will be the same afterwards. How can we tell if the synovitis is healed or recurring at home.