Hi,
Our daughter is going through the same symptoms. Could you share with us what did your daughter case change over the last few years?
Sounds like precocious puberty. It can be brought on by excess body weight or even shampoos. See a doctor to get to the bottom of what is causing it. Find another doctor if the one you are working with dismisses the problem. It is important she not go through puberty too soon for her bone health.