I have/had the same symptoms in my foot, especially for the first year after contracting CRPS.

And there is an absolute marked line on my foot where the CRPS starts and stops. That can be a trademark of CRPS.

I hope your daughter is being treated in a inter-disciplinary manner. Proper medication, therapy (including psychotherapy) conventional and complementary medical treatments. Gotta hit it with everything including the kitchen sink.....

Children often respond better than adults, but time is always of the essence as far as treatment goes. Good luck to you!