My son; who is 16, is a competitive fencer. Over the last 3 months he has been experiencing pain on the bottom of his feet during heavy practices and tournaments. This past weekend it was the worst extreme pain he had. The pain seems to subside when he is not having heavy feet activity (fencing), and his feet isn’t bothering him away from his sport (walking, etc. it is not there). He just seen a doctor today regarding this, they did xrays and an analysis on his feet, but can’t seem to find anything wrong with him. My wife believe this may be muscle related, but unsure. He had special inlays before, but they just made things worse.
What do you think could be the problem?