How do you diagnose a stress fracture?

May need mri. Many stress fractures don't show up on xray exams if there is suspicion of a possible stress fracture, an MRI would best show the injury a bone scan would be helpful but is not as specific for location as the MRI would be.
Bone scan... Bone scan is often helpful. Results may be positive for stress fracture on bone scan before x-ray turns positive.