A: Freiberg's disease (AKA Freiberg's infarction) is a breakdown of the head of a metatarsal (the metatarsal heads are the ball of the foot) in young athletes. This is similar to a stress fracture ...

Q: I have completed 10 marathons. In the latter stages of most of these races (after about mile 17), painful hot spots develop on the balls of both feet, and I am forced to alternate walking with ...