It's two in the morning and you are near tears. Exhaustion from a long day of work is only part of the problem. The reality is, you have been on your feet all day and now the excruciating pain is not only keeping you awake, but also it is also causing your toes to curl under and freeze. It's amazing, isn't it, how much pain can be caused by having that thing you used to think of as an old person's disease