Hello... when i bend my left foot up it hurts.. I've been dealing with this problem for awhile now. My other symptoms are: limping by the end of the night, pain in the foot when going up and down the stairs, difficulty running, back of my foot is VERY tender to the touch and constantly hurts. Brief history, been in the Army part time for almost 23 years, I was an avid runner until about two years ago, currently work as a Corrections Officer so I'm always on my feet.