What does her doctor say? Has she seen a physical therapist or sports medicine specialist or orthopedist? Have they pinpointed the cause of the pain and offered a recommendation for treatment/healing?
I don’t know anything about track, but I know a little bit about sports injuries. My daughter experienced a severe ankle injury which she didn’t let heal properly (in part because of a coach who didn’t want her taking so much time off so pushed her to return to training too soon) and now her ankle is likely permanently damaged.
Let injuries heal. It is not worth it. Do not push through the pain. That’s how you end up with more serious injuries and, in some cases, permanent damage.