Without examining your daughter, no-one can say what may be going on. However, unless causes of pain have been ruled out by a doctor, no pain should be dismissed or not taken seriously.
While it is possible that the pains are not caused by anything specific, if your daughter feels pain, she is feeling it for a reason. Seeing a doctor and discussing the various issues she may be dealing with may help the doctor understand, as well as a thorough physical exam and perhaps some tests.