Well, mammograms can be fairly aggressive, as far as how they make you bend and twist, and how much pressure they apply. Could be you did crack a rib, which might be possible if you're trending towards osteoporosis - have you had a baseline DEXA scan (bone density scan) yet?
You might also have a pulled muscle, or a bruise. If the pain doesn't abate within a few days, I'd call your GP and report your symptoms - maybe there's something s/he can prescribe to help you with the pain. Hope you feel better soon- PJH
Important:
We hope you find this general health information helpful. Please note however, that this Q&A is meant to support not replace the professional medical advice you receive from your doctor. No information in the Answers above is intended to diagnose or treat any condition. The views expressed in the Answers above belong to the individuals who posted them and do not necessarily reflect the views of Remedy Health Media. Remedy Health Media does not review or edit content posted by our community members, but reserves the right to remove any material it deems inappropriate.