Sudden onset of pain of left foot I spent all day Saturday running around an obstacle course. I spent all day Saturday running around an obstacle course. See the original article here: Sudden onset of pain of left foot Related posts: what could cause Pain and swelling on top of my left foot directly under Big toe? Sudden Swelling on ball of foot I have just figured out that I have had flexor retinaculum on my left foot for approx. 2 months. ? What’s causing the separation between 2nd and 3rd toe…my pain in the ball of my foot? Disabling Foot pain for 4 months? Pain in the tibialis posterior tendon section of my foot Pain in heel after not walking on foot for 2 months Texas foot pain HELP! Torn ATFL 2 months ago in severe pain New toe pain 3 months after injury ?