Well stress fractures have a number of causes. As physio's we should be able to take a sound history that should in turn highlight factors that might have lead to the development of a stress fracture. This includes issues such as: training regimen, diet, footwear etc. From that we would perform our physical examination: local, biomechanical, functional. Then we would be perhaps assisted with some investigations: isotopic bone scan, Wikipedia reference-linkMRI etc.

Put it all together and the history and symptoms should lead to the cause which we as the practitioner should be able to resolve. The resolution of a stress fracture is always multi-factorial and even aspects such as pyschology (sports and otherwsie) may well play a part. A dietician should be called in as well if access to one isn't a problem.

Strange question to be honest. Are you still a student?