Hi, may I answer your health queries right now ? Please type your query here... My granddaughter who is 4 1/2 months old is not bending her one leg, rather she is holding is as if the knee is locked. And, she has a swelling at the top of her leg. The Drs. x-rayed it, but no fracture. However, they think she may have a joint infection. I m worried for her. Any advise to this problem. Thanks,