If your child says that his or her foot or ankle hurts, that is a sure reason for concern. Oftentimes, however, children are not so direct. By being observant, however, you will still be able to detect clues that something is not right.
With osteochondritis a lesion forms in the joint where the ends of two bones meet. Usually it is caused by a piece of cartilage that has come loose from the end of one of the bones.