2 years ago someone fell on my foot. I went to a doctor and she told me my foot is fine. Since then my foot sometimes hurt. A year ago I hurt my foot again. Now everytime I exercise my foot turns blue (on the outer side) and it hurts alot on the outer side. I went for a X-ray , CT scan, MRI but all of them showed nothing. I have visited 2 diffrent Orthopedist and not one of them could figure out what was wrong.